feat: introduce app configs with shared auth clients (#1213)

packages/backend/src/apps/gitlab/auth/verify-credentials.ts

@@ -25,6 +25,12 @@ const verifyCredentials = async ($: IGlobalVariable) => {
   $.auth.data.accessToken = data.access_token;
 
   const currentUser = await getCurrentUser($);
+  const screenName = [
+    currentUser.username,
+    $.auth.data.instanceUrl,
+  ]
+    .filter(Boolean)
+    .join(' @ ');
 
   await $.auth.set({
     clientId: $.auth.data.clientId,
@@ -34,7 +40,7 @@ const verifyCredentials = async ($: IGlobalVariable) => {
     scope: data.scope,
     tokenType: data.token_type,
     userId: currentUser.id,
-    screenName: `${currentUser.username} @ ${$.auth.data.instanceUrl}`,
+    screenName,
   });
 };
 

packages/backend/src/db/migrations/20230812132005_create_app_configs.ts

@@ -0,0 +1,17 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  return knex.schema.createTable('app_configs', (table) => {
+    table.uuid('id').primary().defaultTo(knex.raw('gen_random_uuid()'));
+    table.string('key').unique().notNullable();
+    table.boolean('allow_custom_connection').notNullable().defaultTo(false);
+    table.boolean('shared').notNullable().defaultTo(false);
+    table.boolean('disabled').notNullable().defaultTo(false);
+
+    table.timestamps(true, true);
+  });
+}
+
+export async function down(knex: Knex): Promise<void> {
+  return knex.schema.dropTable('app_configs');
+}

packages/backend/src/db/migrations/20230813172729_create_app_auth_clients.ts

@@ -0,0 +1,17 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  return knex.schema.createTable('app_auth_clients', (table) => {
+    table.uuid('id').primary().defaultTo(knex.raw('gen_random_uuid()'));
+    table.string('name').unique().notNullable();
+    table.uuid('app_config_id').notNullable().references('id').inTable('app_configs');
+    table.text('auth_defaults').notNullable();
+    table.boolean('active').notNullable().defaultTo(false);
+
+    table.timestamps(true, true);
+  });
+}
+
+export async function down(knex: Knex): Promise<void> {
+  return knex.schema.dropTable('app_auth_clients');
+}

packages/backend/src/db/migrations/20230815161102_add_app_auth_client_id_in_connections.ts

@@ -0,0 +1,13 @@
+import { Knex } from 'knex';
+
+export async function up(knex: Knex): Promise<void> {
+  await knex.schema.table('connections', async (table) => {
+    table.uuid('app_auth_client_id').references('id').inTable('app_auth_clients');
+  });
+}
+
+export async function down(knex: Knex): Promise<void> {
+  return await knex.schema.table('connections', (table) => {
+    table.dropColumn('app_auth_client_id');
+  });
+}

packages/backend/src/db/migrations/20230816121044_seed_update_app_permissions_to_admin.ts

@@ -0,0 +1,33 @@
+import { Knex } from 'knex';
+
+const getPermissionForRole = (
+  roleId: string,
+  subject: string,
+  actions: string[]
+) =>
+  actions.map((action) => ({
+    role_id: roleId,
+    subject,
+    action,
+    conditions: [],
+  }));
+
+export async function up(knex: Knex): Promise<void> {
+  const role = (await knex('roles')
+    .first(['id', 'key'])
+    .where({ key: 'admin' })
+    .limit(1)) as { id: string; key: string };
+
+  await knex('permissions').insert(
+    getPermissionForRole(role.id, 'App', [
+      'create',
+      'read',
+      'delete',
+      'update',
+    ])
+  );
+}
+
+export async function down(knex: Knex): Promise<void> {
+  await knex('permissions').where({ subject: 'App' }).delete();
+}

packages/backend/src/graphql/mutation-resolvers.ts

@@ -1,3 +1,5 @@
+import createAppAuthClient from './mutations/create-app-auth-client.ee';
+import createAppConfig from './mutations/create-app-config.ee';
 import createConnection from './mutations/create-connection';
 import createFlow from './mutations/create-flow';
 import createRole from './mutations/create-role.ee';
@@ -17,6 +19,8 @@ import login from './mutations/login';
 import registerUser from './mutations/register-user.ee';
 import resetConnection from './mutations/reset-connection';
 import resetPassword from './mutations/reset-password.ee';
+import updateAppAuthClient from './mutations/update-app-auth-client.ee';
+import updateAppConfig from './mutations/update-app-config.ee';
 import updateConfig from './mutations/update-config.ee';
 import updateConnection from './mutations/update-connection';
 import updateCurrentUser from './mutations/update-current-user';
@@ -30,6 +34,8 @@ import upsertSamlAuthProvidersRoleMappings from './mutations/upsert-saml-auth-pr
 import verifyConnection from './mutations/verify-connection';
 
 const mutationResolvers = {
+  createAppAuthClient,
+  createAppConfig,
   createConnection,
   createFlow,
   createRole,
@@ -49,6 +55,8 @@ const mutationResolvers = {
   registerUser,
   resetConnection,
   resetPassword,
+  updateAppAuthClient,
+  updateAppConfig,
   updateConfig,
   updateConnection,
   updateCurrentUser,

packages/backend/src/graphql/mutations/create-app-auth-client.ee.ts

@@ -0,0 +1,35 @@
+import { IJSONObject } from '@automatisch/types';
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
+
+type Params = {
+  input: {
+    appConfigId: string;
+    name: string;
+    formattedAuthDefaults?: IJSONObject;
+    active?: boolean;
+  };
+};
+
+const createAppAuthClient = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  context.currentUser.can('update', 'App');
+
+  const appConfig = await AppConfig
+    .query()
+    .findById(params.input.appConfigId)
+    .throwIfNotFound();
+
+  const appAuthClient = await appConfig
+    .$relatedQuery('appAuthClients')
+    .insert(
+      params.input
+    );
+
+  return appAuthClient;
+};
+
+export default createAppAuthClient;

packages/backend/src/graphql/mutations/create-app-config.ee.ts

@@ -0,0 +1,36 @@
+import App from '../../models/app';
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
+
+type Params = {
+  input: {
+    key: string;
+    allowCustomConnection?: boolean;
+    shared?: boolean;
+    disabled?: boolean;
+  };
+};
+
+const createAppConfig = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  context.currentUser.can('update', 'App');
+
+  const key = params.input.key;
+
+  const app = await App.findOneByKey(key);
+
+  if (!app) throw new Error('The app cannot be found!');
+
+  const appConfig = await AppConfig
+    .query()
+    .insert(
+      params.input
+    );
+
+  return appConfig;
+};
+
+export default createAppConfig;

packages/backend/src/graphql/mutations/create-connection.ts

@@ -1,13 +1,16 @@
-import App from '../../models/app';
-import Context from '../../types/express/context';
 import { IJSONObject } from '@automatisch/types';
+import App from '../../models/app';
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
 
 type Params = {
   input: {
     key: string;
+    appAuthClientId: string;
     formattedData: IJSONObject;
   };
 };
+
 const createConnection = async (
   _parent: unknown,
   params: Params,
@@ -15,13 +18,42 @@ const createConnection = async (
 ) => {
   context.currentUser.can('create', 'Connection');
 
-  await App.findOneByKey(params.input.key);
+  const { key, appAuthClientId } = params.input;
 
-  return await context.currentUser.$relatedQuery('connections').insert({
-    key: params.input.key,
-    formattedData: params.input.formattedData,
+  const app = await App.findOneByKey(key);
+
+  const appConfig = await AppConfig.query().findOne({ key });
+
+  let formattedData = params.input.formattedData;
+  if (appConfig) {
+    if (appConfig.disabled) throw new Error('This application has been disabled for new connections!');
+
+    if (!appConfig.allowCustomConnection && formattedData) throw new Error(`Custom connections cannot be created for ${app.name}!`);
+
+    if (appConfig.shared && !formattedData) {
+      const authClient = await appConfig
+        .$relatedQuery('appAuthClients')
+        .findById(appAuthClientId)
+        .where({
+          active: true
+        })
+        .throwIfNotFound();
+
+      formattedData = authClient.formattedAuthDefaults;
+    }
+  }
+
+  const createdConnection = await context
+    .currentUser
+    .$relatedQuery('connections')
+    .insert({
+      key,
+      appAuthClientId,
+      formattedData,
       verified: false,
     });
+
+  return createdConnection;
 };
 
 export default createConnection;

packages/backend/src/graphql/mutations/delete-app-auth-client.ee.ts

@@ -0,0 +1,28 @@
+import Context from '../../types/express/context';
+import AppAuthClient from '../../models/app-auth-client';
+
+type Params = {
+  input: {
+    id: string;
+  };
+};
+
+const deleteAppAuthClient = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  context.currentUser.can('delete', 'App');
+
+  await AppAuthClient
+    .query()
+    .delete()
+    .findOne({
+      id: params.input.id,
+    })
+    .throwIfNotFound();
+
+  return;
+};
+
+export default deleteAppAuthClient;

packages/backend/src/graphql/mutations/update-app-auth-client.ee.ts

@@ -0,0 +1,38 @@
+import { IJSONObject } from '@automatisch/types';
+import AppAuthClient from '../../models/app-auth-client';
+import Context from '../../types/express/context';
+
+type Params = {
+  input: {
+    id: string;
+    name: string;
+    formattedAuthDefaults?: IJSONObject;
+    active?: boolean;
+  };
+};
+
+const updateAppAuthClient = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  context.currentUser.can('update', 'App');
+
+  const {
+    id,
+    ...appAuthClientData
+  } = params.input;
+
+  const appAuthClient = await AppAuthClient
+    .query()
+    .findById(id)
+    .throwIfNotFound();
+
+  await appAuthClient
+    .$query()
+    .patch(appAuthClientData);
+
+  return appAuthClient;
+};
+
+export default updateAppAuthClient;

packages/backend/src/graphql/mutations/update-app-config.ee.ts

@@ -0,0 +1,39 @@
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
+
+type Params = {
+  input: {
+    id: string;
+    allowCustomConnection?: boolean;
+    shared?: boolean;
+    disabled?: boolean;
+  };
+};
+
+const updateAppConfig = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  context.currentUser.can('update', 'App');
+
+  const {
+    id,
+    ...appConfigToUpdate
+  } = params.input;
+
+  const appConfig = await AppConfig
+    .query()
+    .findById(id)
+    .throwIfNotFound();
+
+  await appConfig
+    .$query()
+    .patch(
+      appConfigToUpdate
+    );
+
+  return appConfig;
+};
+
+export default updateAppConfig;

packages/backend/src/graphql/mutations/update-connection.ts

@@ -1,10 +1,12 @@
-import Context from '../../types/express/context';
 import { IJSONObject } from '@automatisch/types';
+import Context from '../../types/express/context';
+import AppAuthClient from '../../models/app-auth-client';
 
 type Params = {
   input: {
     id: string;
-    formattedData: IJSONObject;
+    formattedData?: IJSONObject;
+    appAuthClientId?: string;
   };
 };
 
@@ -22,10 +24,21 @@ const updateConnection = async (
     })
     .throwIfNotFound();
 
+  let formattedData = params.input.formattedData;
+
+  if (params.input.appAuthClientId) {
+    const appAuthClient = await AppAuthClient
+      .query()
+      .findById(params.input.appAuthClientId)
+      .throwIfNotFound();
+
+    formattedData = appAuthClient.formattedAuthDefaults;
+  }
+
   connection = await connection.$query().patchAndFetch({
     formattedData: {
       ...connection.formattedData,
-      ...params.input.formattedData,
+      ...formattedData,
     },
   });
 

packages/backend/src/graphql/queries/get-app-auth-client.ee.ts

@@ -0,0 +1,30 @@
+import AppAuthClient from '../../models/app-auth-client';
+import Context from '../../types/express/context';
+
+type Params = {
+  id: string;
+};
+
+const getAppAuthClient = async (_parent: unknown, params: Params, context: Context) => {
+  let canSeeAllClients = false;
+  try {
+    context.currentUser.can('read', 'App');
+
+    canSeeAllClients = true;
+  } catch {
+    // void
+  }
+
+  const appAuthClient = AppAuthClient
+    .query()
+    .findById(params.id)
+    .throwIfNotFound();
+
+  if (!canSeeAllClients) {
+    appAuthClient.where({ active: true });
+  }
+
+  return await appAuthClient;
+};
+
+export default getAppAuthClient;

packages/backend/src/graphql/queries/get-app-auth-clients.ee.ts

@@ -0,0 +1,40 @@
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
+
+type Params = {
+  appKey: string;
+  active: boolean;
+};
+
+const getAppAuthClients = async (_parent: unknown, params: Params, context: Context) => {
+  let canSeeAllClients = false;
+  try {
+    context.currentUser.can('read', 'App');
+
+    canSeeAllClients = true;
+  } catch {
+    // void
+  }
+
+  const appConfig = await AppConfig
+    .query()
+    .findOne({
+      key: params.appKey,
+    })
+    .throwIfNotFound();
+
+  const appAuthClients = appConfig
+    .$relatedQuery('appAuthClients')
+    .where({ active: params.active })
+    .skipUndefined();
+
+  if (!canSeeAllClients) {
+    appAuthClients.where({
+      active: true
+    })
+  }
+
+  return await appAuthClients;
+};
+
+export default getAppAuthClients;

packages/backend/src/graphql/queries/get-app-config.ee.ts

@@ -0,0 +1,23 @@
+import AppConfig from '../../models/app-config';
+import Context from '../../types/express/context';
+
+type Params = {
+  key: string;
+};
+
+const getAppConfig = async (_parent: unknown, params: Params, context: Context) => {
+  context.currentUser.can('create', 'Connection');
+
+  const appConfig = await AppConfig
+    .query()
+    .withGraphFetched({
+      appAuthClients: true
+    })
+    .findOne({
+      key: params.key
+    });
+
+  return appConfig;
+};
+
+export default getAppConfig;

packages/backend/src/graphql/queries/get-app.ts

@@ -19,6 +19,10 @@ const getApp = async (_parent: unknown, params: Params, context: Context) => {
     const connections = await connectionBaseQuery
       .clone()
       .select('connections.*')
+      .withGraphFetched({
+        appConfig: true,
+        appAuthClient: true
+      })
       .fullOuterJoinRelated('steps')
       .where({
         'connections.key': params.key,

packages/backend/src/graphql/query-resolvers.ts

@@ -1,9 +1,12 @@
 import getApp from './queries/get-app';
+import getAppAuthClient from './queries/get-app-auth-client.ee';
+import getAppAuthClients from './queries/get-app-auth-clients.ee';
+import getAppConfig from './queries/get-app-config.ee';
 import getApps from './queries/get-apps';
 import getAutomatischInfo from './queries/get-automatisch-info';
 import getBillingAndUsage from './queries/get-billing-and-usage.ee';
-import getConnectedApps from './queries/get-connected-apps';
 import getConfig from './queries/get-config.ee';
+import getConnectedApps from './queries/get-connected-apps';
 import getCurrentUser from './queries/get-current-user';
 import getDynamicData from './queries/get-dynamic-data';
 import getDynamicFields from './queries/get-dynamic-fields';
@@ -30,6 +33,9 @@ import testConnection from './queries/test-connection';
 
 const queryResolvers = {
   getApp,
+  getAppAuthClient,
+  getAppAuthClients,
+  getAppConfig,
   getApps,
   getAutomatischInfo,
   getBillingAndUsage,

packages/backend/src/graphql/schema.graphql

@@ -5,6 +5,9 @@ type Query {
     onlyWithActions: Boolean
   ): [App]
   getApp(key: String!): App
+  getAppConfig(key: String!): AppConfig
+  getAppAuthClient(id: String!): AppAuthClient
+  getAppAuthClients(appKey: String!, active: Boolean): [AppAuthClient]
   getConnectedApps(name: String): [App]
   testConnection(id: String!): Connection
   getFlow(id: String!): Flow
@@ -49,10 +52,12 @@ type Query {
   getUser(id: String!): User
   getUsers(limit: Int!, offset: Int!): UserConnection
   healthcheck: AppHealth
-  listSamlAuthProviders: [ListSamlAuthProviders]
+  listSamlAuthProviders: [ListSamlAuthProvider]
 }
 
 type Mutation {
+  createAppConfig(input: CreateAppConfigInput): AppConfig
+  createAppAuthClient(input: CreateAppAuthClientInput): AppAuthClient
   createConnection(input: CreateConnectionInput): Connection
   createFlow(input: CreateFlowInput): Flow
   createRole(input: CreateRoleInput): Role
@@ -72,6 +77,8 @@ type Mutation {
   registerUser(input: RegisterUserInput): User
   resetConnection(input: ResetConnectionInput): Connection
   resetPassword(input: ResetPasswordInput): Boolean
+  updateAppAuthClient(input: UpdateAppAuthClientInput): AppAuthClient
+  updateAppConfig(input: UpdateAppConfigInput): AppConfig
   updateConfig(input: JSONObject): JSONObject
   updateConnection(input: UpdateConnectionInput): Connection
   updateCurrentUser(input: UpdateCurrentUserInput): User
@@ -162,6 +169,16 @@ type SubstepArgumentAdditionalFieldsArgument {
   value: String
 }
 
+type AppConfig {
+  id: String
+  key: String
+  allowCustomConnection: Boolean
+  canConnect: Boolean
+  canCustomConnect: Boolean
+  shared: Boolean
+  disabled: Boolean
+}
+
 type App {
   name: String
   key: String
@@ -181,7 +198,9 @@ type App {
 type AppAuth {
   fields: [Field]
   authenticationSteps: [AuthenticationStep]
+  sharedAuthenticationSteps: [AuthenticationStep]
   reconnectionSteps: [ReconnectionStep]
+  sharedReconnectionSteps: [ReconnectionStep]
 }
 
 enum ArgumentEnumType {
@@ -219,6 +238,8 @@ type AuthLink {
 type Connection {
   id: String
   key: String
+  reconnectable: Boolean
+  appAuthClientId: String
   formattedData: ConnectionData
   verified: Boolean
   app: App
@@ -328,7 +349,8 @@ type UserEdge {
 
 input CreateConnectionInput {
   key: String!
-  formattedData: JSONObject!
+  appAuthClientId: String
+  formattedData: JSONObject
 }
 
 input GenerateAuthUrlInput {
@@ -337,7 +359,8 @@ input GenerateAuthUrlInput {
 
 input UpdateConnectionInput {
   id: String!
-  formattedData: JSONObject!
+  formattedData: JSONObject
+  appAuthClientId: String
 }
 
 input ResetConnectionInput {
@@ -690,7 +713,7 @@ type PaymentPlan {
   productId: String
 }
 
-type ListSamlAuthProviders {
+type ListSamlAuthProvider {
   id: String
   name: String
   issuer: String
@@ -725,6 +748,41 @@ type Subject {
   key: String
 }
 
+input CreateAppConfigInput {
+  key: String
+  allowCustomConnection: Boolean
+  shared: Boolean
+  disabled: Boolean
+}
+
+input UpdateAppConfigInput {
+  id: String
+  allowCustomConnection: Boolean
+  shared: Boolean
+  disabled: Boolean
+}
+
+type AppAuthClient {
+  id: String
+  appConfigId: String
+  name: String
+  active: Boolean
+}
+
+input CreateAppAuthClientInput {
+  appConfigId: String
+  name: String
+  formattedAuthDefaults: JSONObject
+  active: Boolean
+}
+
+input UpdateAppAuthClientInput {
+  id: String
+  name: String
+  formattedAuthDefaults: JSONObject
+  active: Boolean
+}
+
 schema {
   query: Query
   mutation: Mutation

packages/backend/src/helpers/add-authentication-steps.ts

@@ -3,6 +3,7 @@ import { IApp } from '@automatisch/types';
 function addAuthenticationSteps(app: IApp): IApp {
   if (app.auth.generateAuthUrl) {
     app.auth.authenticationSteps = authenticationStepsWithAuthUrl;
+    app.auth.sharedAuthenticationSteps = sharedAuthenticationStepsWithAuthUrl;
   } else {
     app.auth.authenticationSteps = authenticationStepsWithoutAuthUrl;
   }
@@ -98,4 +99,65 @@ const authenticationStepsWithAuthUrl = [
   },
 ];
 
+const sharedAuthenticationStepsWithAuthUrl = [
+  {
+    type: 'mutation' as const,
+    name: 'createConnection',
+    arguments: [
+      {
+        name: 'key',
+        value: '{key}',
+      },
+      {
+        name: 'appAuthClientId',
+        value: '{appAuthClientId}',
+      },
+    ],
+  },
+  {
+    type: 'mutation' as const,
+    name: 'generateAuthUrl',
+    arguments: [
+      {
+        name: 'id',
+        value: '{createConnection.id}',
+      },
+    ],
+  },
+  {
+    type: 'openWithPopup' as const,
+    name: 'openAuthPopup',
+    arguments: [
+      {
+        name: 'url',
+        value: '{generateAuthUrl.url}',
+      },
+    ],
+  },
+  {
+    type: 'mutation' as const,
+    name: 'updateConnection',
+    arguments: [
+      {
+        name: 'id',
+        value: '{createConnection.id}',
+      },
+      {
+        name: 'formattedData',
+        value: '{openAuthPopup.all}',
+      },
+    ],
+  },
+  {
+    type: 'mutation' as const,
+    name: 'verifyConnection',
+    arguments: [
+      {
+        name: 'id',
+        value: '{createConnection.id}',
+      },
+    ],
+  },
+];
+
 export default addAuthenticationSteps;

packages/backend/src/helpers/add-reconnection-steps.ts

@@ -67,11 +67,21 @@ function addReconnectionSteps(app: IApp): IApp {
 
   if (hasReconnectionSteps) return app;
 
+  if (app.auth.authenticationSteps) {
     const updatedSteps = replaceCreateConnectionsWithUpdate(
       app.auth.authenticationSteps
     );
 
     app.auth.reconnectionSteps = [resetConnectionStep, ...updatedSteps];
+  }
+
+  if (app.auth.sharedAuthenticationSteps) {
+    const updatedStepsWithEmbeddedDefaults = replaceCreateConnectionsWithUpdate(
+      app.auth.sharedAuthenticationSteps
+    );
+
+    app.auth.sharedReconnectionSteps = [resetConnectionStep, ...updatedStepsWithEmbeddedDefaults];
+  }
 
   return app;
 }

packages/backend/src/models/app-auth-client.ts

@@ -0,0 +1,91 @@
+import { IJSONObject } from '@automatisch/types';
+import { AES, enc } from 'crypto-js';
+import { ModelOptions, QueryContext } from 'objection';
+import appConfig from '../config/app';
+import AppConfig from './app-config';
+import Base from './base';
+
+class AppAuthClient extends Base {
+  id!: string;
+  name: string;
+  active: boolean;
+  appConfigId!: string;
+  authDefaults: string;
+  formattedAuthDefaults?: IJSONObject;
+  appConfig?: AppConfig;
+
+  static tableName = 'app_auth_clients';
+
+  static jsonSchema = {
+    type: 'object',
+    required: ['name', 'appConfigId', 'formattedAuthDefaults'],
+
+    properties: {
+      id: { type: 'string', format: 'uuid' },
+      appConfigId: { type: 'string', format: 'uuid' },
+      active: { type: 'boolean' },
+      authDefaults: { type: ['string', 'null'] },
+      formattedAuthDefaults: { type: 'object' },
+      createdAt: { type: 'string' },
+      updatedAt: { type: 'string' },
+    },
+  };
+
+  static relationMappings = () => ({
+    appConfig: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: AppConfig,
+      join: {
+        from: 'app_auth_clients.app_config_id',
+        to: 'app_configs.id',
+      },
+    },
+  });
+
+  encryptData(): void {
+    if (!this.eligibleForEncryption()) return;
+
+    this.authDefaults = AES.encrypt(
+      JSON.stringify(this.formattedAuthDefaults),
+      appConfig.encryptionKey
+    ).toString();
+
+    delete this.formattedAuthDefaults;
+  }
+  decryptData(): void {
+    if (!this.eligibleForDecryption()) return;
+
+    this.formattedAuthDefaults = JSON.parse(
+      AES.decrypt(this.authDefaults, appConfig.encryptionKey).toString(enc.Utf8)
+    );
+  }
+
+  eligibleForEncryption(): boolean {
+    return this.formattedAuthDefaults ? true : false;
+  }
+
+  eligibleForDecryption(): boolean {
+    return this.authDefaults ? true : false;
+  }
+
+  // TODO: Make another abstraction like beforeSave instead of using
+  // beforeInsert and beforeUpdate separately for the same operation.
+  async $beforeInsert(queryContext: QueryContext): Promise<void> {
+    await super.$beforeInsert(queryContext);
+    this.encryptData();
+  }
+
+  async $beforeUpdate(
+    opt: ModelOptions,
+    queryContext: QueryContext
+  ): Promise<void> {
+    await super.$beforeUpdate(opt, queryContext);
+    this.encryptData();
+  }
+
+  async $afterFind(): Promise<void> {
+    this.decryptData();
+  }
+}
+
+export default AppAuthClient;

packages/backend/src/models/app-config.ts

@@ -0,0 +1,70 @@
+import App from './app';
+import Base from './base';
+import AppAuthClient from './app-auth-client';
+
+class AppConfig extends Base {
+  id!: string;
+  key!: string;
+  allowCustomConnection: boolean;
+  shared: boolean;
+  disabled: boolean;
+  app?: App;
+  appAuthClients?: AppAuthClient[];
+
+  static tableName = 'app_configs';
+
+  static jsonSchema = {
+    type: 'object',
+    required: ['key'],
+
+    properties: {
+      id: { type: 'string', format: 'uuid' },
+      key: { type: 'string' },
+      allowCustomConnection: { type: 'boolean', default: false },
+      shared: { type: 'boolean', default: false },
+      disabled: { type: 'boolean', default: false },
+    },
+  };
+
+  static get virtualAttributes() {
+    return ['canConnect', 'canCustomConnect'];
+  }
+
+  static relationMappings = () => ({
+    appAuthClients: {
+      relation: Base.HasManyRelation,
+      modelClass: AppAuthClient,
+      join: {
+        from: 'app_configs.id',
+        to: 'app_auth_clients.app_config_id',
+      },
+    },
+  });
+
+  get canCustomConnect() {
+    return !this.disabled && this.allowCustomConnection;
+  }
+
+  get canConnect() {
+    const hasSomeActiveAppAuthClients = !!this.appAuthClients
+      ?.some(appAuthClient => appAuthClient.active);
+    const shared = this.shared;
+    const active = this.disabled === false;
+
+    const conditions = [
+      hasSomeActiveAppAuthClients,
+      shared,
+      active
+    ];
+
+    return conditions.every(Boolean);
+  }
+
+  async getApp() {
+    if (!this.key) return null;
+
+    return await App.findOneByKey(this.key);
+  }
+}
+
+export default AppConfig;

packages/backend/src/models/connection.ts

@@ -3,6 +3,8 @@ import type { RelationMappings } from 'objection';
 import { AES, enc } from 'crypto-js';
 import { IRequest } from '@automatisch/types';
 import App from './app';
+import AppConfig from './app-config';
+import AppAuthClient from './app-auth-client';
 import Base from './base';
 import User from './user';
 import Step from './step';
@@ -25,6 +27,9 @@ class Connection extends Base {
   user?: User;
   steps?: Step[];
   triggerSteps?: Step[];
+  appAuthClientId?: string;
+  appAuthClient?: AppAuthClient;
+  appConfig?: AppConfig;
 
   static tableName = 'connections';
 
@@ -38,6 +43,7 @@ class Connection extends Base {
       data: { type: 'string' },
       formattedData: { type: 'object' },
       userId: { type: 'string', format: 'uuid' },
+      appAuthClientId: { type: 'string', format: 'uuid' },
       verified: { type: 'boolean', default: false },
       draft: { type: 'boolean' },
       deletedAt: { type: 'string' },
@@ -46,6 +52,10 @@ class Connection extends Base {
     },
   };
 
+  static get virtualAttributes() {
+    return ['reconnectable'];
+  }
+
   static relationMappings = (): RelationMappings => ({
     user: {
       relation: Base.BelongsToOneRelation,
@@ -74,8 +84,36 @@ class Connection extends Base {
         builder.where('type', '=', 'trigger');
       },
     },
+    appConfig: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: AppConfig,
+      join: {
+        from: 'connections.key',
+        to: 'app_configs.key',
+      },
+    },
+    appAuthClient: {
+      relation: Base.BelongsToOneRelation,
+      modelClass: AppAuthClient,
+      join: {
+        from: 'connections.app_auth_client_id',
+        to: 'app_auth_clients.id',
+      },
+    },
   });
 
+  get reconnectable() {
+    if (this.appAuthClientId) {
+      return this.appAuthClient.active;
+    }
+
+    if (this.appConfig) {
+      return !this.appConfig.disabled && this.appConfig.allowCustomConnection;
+    }
+
+    return true;
+  }
+
   encryptData(): void {
     if (!this.eligibleForEncryption()) return;
 

packages/backend/src/models/user.ts

@@ -294,6 +294,7 @@ class User extends Base {
     if (Array.isArray(this.permissions)) {
       this.permissions = this.permissions.filter((permission) => {
         const restrictedSubjects = [
+          'App',
           'Role',
           'SamlAuthProvider',
           'Config',

packages/types/index.d.ts

@@ -27,6 +27,8 @@ export interface IConnection {
   flowCount?: number;
   appData?: IApp;
   createdAt: string;
+  reconnectable?: boolean;
+  appAuthClientId?: string;
 }
 
 export interface IExecutionStep {
@@ -247,6 +249,8 @@ export interface IAuth {
   fields?: IField[];
   authenticationSteps?: IAuthenticationStep[];
   reconnectionSteps?: IAuthenticationStep[];
+  sharedAuthenticationSteps?: IAuthenticationStep[];
+  sharedReconnectionSteps?: IAuthenticationStep[];
 }
 
 export interface ITriggerOutput {
@@ -424,6 +428,24 @@ type TSamlAuthProvider = {
   defaultRoleId: string;
 }
 
+type AppConfig = {
+  id: string;
+  key: string;
+  allowCustomConnection: boolean;
+  canConnect: boolean;
+  canCustomConnect: boolean;
+  shared: boolean;
+  disabled: boolean;
+}
+
+type AppAuthClient = {
+  id: string;
+  name: string;
+  appConfigId: string;
+  authDefaults: string;
+  formattedAuthDefaults: IJSONObject;
+}
+
 declare module 'axios' {
   interface AxiosResponse {
     httpError?: IJSONObject;

packages/web/src/components/AddAppConnection/index.tsx

@@ -1,17 +1,19 @@
-import * as React from 'react';
+import type { IApp, IField, IJSONObject } from '@automatisch/types';
+import LoadingButton from '@mui/lab/LoadingButton';
 import Alert from '@mui/material/Alert';
-import DialogTitle from '@mui/material/DialogTitle';
+import Dialog from '@mui/material/Dialog';
 import DialogContent from '@mui/material/DialogContent';
 import DialogContentText from '@mui/material/DialogContentText';
-import Dialog from '@mui/material/Dialog';
-import LoadingButton from '@mui/lab/LoadingButton';
+import DialogTitle from '@mui/material/DialogTitle';
+import * as React from 'react';
 import { FieldValues, SubmitHandler } from 'react-hook-form';
-import type { IApp, IJSONObject, IField } from '@automatisch/types';
+import { useNavigate, useSearchParams } from 'react-router-dom';
 
-import useFormatMessage from 'hooks/useFormatMessage';
-import computeAuthStepVariables from 'helpers/computeAuthStepVariables';
-import { processStep } from 'helpers/authenticationSteps';
+import AppAuthClientsDialog from 'components/AppAuthClientsDialog/index.ee';
 import InputCreator from 'components/InputCreator';
+import * as URLS from 'config/urls';
+import useAuthenticateApp from 'hooks/useAuthenticateApp.ee';
+import useFormatMessage from 'hooks/useFormatMessage';
 import { generateExternalLink } from '../../helpers/translationValues';
 import { Form } from './style';
 
@@ -21,24 +23,27 @@ type AddAppConnectionProps = {
   connectionId?: string;
 };
 
-type Response = {
-  [key: string]: any;
-};
-
 export default function AddAppConnection(
   props: AddAppConnectionProps
 ): React.ReactElement {
   const { application, connectionId, onClose } = props;
   const { name, authDocUrl, key, auth } = application;
+  const navigate = useNavigate();
+  const [searchParams] = useSearchParams();
   const formatMessage = useFormatMessage();
   const [error, setError] = React.useState<IJSONObject | null>(null);
   const [inProgress, setInProgress] = React.useState(false);
   const hasConnection = Boolean(connectionId);
-  const steps = hasConnection
-    ? auth?.reconnectionSteps
-    : auth?.authenticationSteps;
+  const useShared = searchParams.get('shared') === 'true';
+  const appAuthClientId = searchParams.get('appAuthClientId') || undefined;
+  const { authenticate } = useAuthenticateApp({
+    appKey: key,
+    connectionId,
+    appAuthClientId,
+    useShared: !!appAuthClientId,
+  });
 
-  React.useEffect(() => {
+  React.useEffect(function relayProviderData() {
     if (window.opener) {
       window.opener.postMessage({
         source: 'automatisch',
@@ -48,51 +53,61 @@ export default function AddAppConnection(
     }
   }, []);
 
-  const submitHandler: SubmitHandler<FieldValues> = React.useCallback(
-    async (data) => {
-      if (!steps) return;
+  React.useEffect(
+    function initiateSharedAuthenticationForGivenAuthClient() {
+      if (!appAuthClientId) return;
+      if (!authenticate) return;
 
-      setInProgress(true);
-      setError(null);
+      const asyncAuthenticate = async () => {
+        await authenticate();
 
-      const response: Response = {
-        key,
-        connection: {
-          id: connectionId,
-        },
-        fields: data,
+        navigate(URLS.APP_CONNECTIONS(key));
       };
 
-      let stepIndex = 0;
-      while (stepIndex < steps.length) {
-        const step = steps[stepIndex];
-        const variables = computeAuthStepVariables(step.arguments, response);
+      asyncAuthenticate();
+    },
+    [appAuthClientId, authenticate]
+  );
+
+  const handleClientClick = (appAuthClientId: string) =>
+    navigate(URLS.APP_ADD_CONNECTION_WITH_AUTH_CLIENT_ID(key, appAuthClientId));
+
+  const handleAuthClientsDialogClose = () =>
+    navigate(URLS.APP_CONNECTIONS(key));
+
+  const submitHandler: SubmitHandler<FieldValues> = React.useCallback(
+    async (data) => {
+      if (!authenticate) return;
+
+      setInProgress(true);
 
       try {
-          const stepResponse = await processStep(step, variables);
-
-          response[step.name] = stepResponse;
+        const response = await authenticate({
+          fields: data,
+        });
+        onClose(response as Record<string, unknown>);
       } catch (err) {
         const error = err as IJSONObject;
         console.log(error);
         setError((error.graphQLErrors as IJSONObject[])?.[0]);
+      } finally {
         setInProgress(false);
-
-          break;
       }
-
-        stepIndex++;
-
-        if (stepIndex === steps.length) {
-          onClose(response);
-        }
-      }
-
-      setInProgress(false);
     },
-    [connectionId, key, steps, onClose]
+    [authenticate]
   );
 
+  if (useShared)
+    return (
+      <AppAuthClientsDialog
+        appKey={key}
+        onClose={handleAuthClientsDialogClose}
+        onClientClick={handleClientClick}
+      />
+    );
+
+  if (appAuthClientId) return <React.Fragment />;
+
   return (
     <Dialog open={true} onClose={onClose} data-test="add-app-connection-dialog">
       <DialogTitle>

packages/web/src/components/AppAuthClientsDialog/index.ee.tsx

@@ -0,0 +1,50 @@
+import Dialog from '@mui/material/Dialog';
+import DialogTitle from '@mui/material/DialogTitle';
+import List from '@mui/material/List';
+import ListItem from '@mui/material/ListItem';
+import ListItemButton from '@mui/material/ListItemButton';
+import ListItemText from '@mui/material/ListItemText';
+import * as React from 'react';
+
+import useAppAuthClients from 'hooks/useAppAuthClients.ee';
+import useFormatMessage from 'hooks/useFormatMessage';
+
+type AppAuthClientsDialogProps = {
+  appKey: string;
+  onClientClick: (appAuthClientId: string) => void;
+  onClose: () => void;
+};
+
+export default function AppAuthClientsDialog(props: AppAuthClientsDialogProps) {
+  const { appKey, onClientClick, onClose } = props;
+  const { appAuthClients } = useAppAuthClients(appKey);
+  const formatMessage = useFormatMessage();
+
+  React.useEffect(
+    function autoAuthenticateSingleClient() {
+      if (appAuthClients?.length === 1) {
+        onClientClick(appAuthClients[0].id);
+      }
+    },
+    [appAuthClients]
+  );
+
+  if (!appAuthClients?.length || appAuthClients?.length === 1)
+    return <React.Fragment />;
+
+  return (
+    <Dialog onClose={onClose} open={true}>
+      <DialogTitle>{formatMessage('appAuthClientsDialog.title')}</DialogTitle>
+
+      <List sx={{ pt: 0 }}>
+        {appAuthClients.map((appAuthClient) => (
+          <ListItem disableGutters key={appAuthClient.id}>
+            <ListItemButton onClick={() => onClientClick(appAuthClient.id)}>
+              <ListItemText primary={appAuthClient.name} />
+            </ListItemButton>
+          </ListItem>
+        ))}
+      </List>
+    </Dialog>
+  );
+}

packages/web/src/components/AppConnectionContextMenu/index.tsx

@@ -3,6 +3,7 @@ import { Link } from 'react-router-dom';
 import Menu from '@mui/material/Menu';
 import type { PopoverProps } from '@mui/material/Popover';
 import MenuItem from '@mui/material/MenuItem';
+import type { IConnection } from '@automatisch/types';
 
 import * as URLS from 'config/urls';
 import useFormatMessage from 'hooks/useFormatMessage';
@@ -13,16 +14,24 @@ type Action = {
 
 type ContextMenuProps = {
   appKey: string;
-  connectionId: string;
+  connection: IConnection;
   onClose: () => void;
   onMenuItemClick: (event: React.MouseEvent, action: Action) => void;
   anchorEl: PopoverProps['anchorEl'];
+  disableReconnection: boolean;
 };
 
 export default function ContextMenu(
   props: ContextMenuProps
 ): React.ReactElement {
-  const { appKey, connectionId, onClose, onMenuItemClick, anchorEl } = props;
+  const {
+    appKey,
+    connection,
+    onClose,
+    onMenuItemClick,
+    anchorEl,
+    disableReconnection,
+  } = props;
   const formatMessage = useFormatMessage();
 
   const createActionHandler = React.useCallback(
@@ -45,7 +54,7 @@ export default function ContextMenu(
     >
       <MenuItem
         component={Link}
-        to={URLS.APP_FLOWS_FOR_CONNECTION(appKey, connectionId)}
+        to={URLS.APP_FLOWS_FOR_CONNECTION(appKey, connection.id)}
         onClick={createActionHandler({ type: 'viewFlows' })}
       >
         {formatMessage('connection.viewFlows')}
@@ -57,7 +66,12 @@ export default function ContextMenu(
 
       <MenuItem
         component={Link}
-        to={URLS.APP_RECONNECT_CONNECTION(appKey, connectionId)}
+        disabled={disableReconnection}
+        to={URLS.APP_RECONNECT_CONNECTION(
+          appKey,
+          connection.id,
+          connection.appAuthClientId
+        )}
         onClick={createActionHandler({ type: 'reconnect' })}
       >
         {formatMessage('connection.reconnect')}

packages/web/src/components/AppConnectionRow/index.tsx

@@ -45,8 +45,15 @@ function AppConnectionRow(props: AppConnectionRowProps): React.ReactElement {
   const [deleteConnection] = useMutation(DELETE_CONNECTION);
 
   const formatMessage = useFormatMessage();
-  const { id, key, formattedData, verified, createdAt, flowCount } =
-    props.connection;
+  const {
+    id,
+    key,
+    formattedData,
+    verified,
+    createdAt,
+    flowCount,
+    reconnectable,
+  } = props.connection;
 
   const contextButtonRef = React.useRef<SVGSVGElement | null>(null);
   const [anchorEl, setAnchorEl] = React.useState<SVGSVGElement | null>(null);
@@ -159,7 +166,8 @@ function AppConnectionRow(props: AppConnectionRowProps): React.ReactElement {
       {anchorEl && (
         <ConnectionContextMenu
           appKey={key}
-          connectionId={id}
+          connection={props.connection}
+          disableReconnection={!reconnectable}
           onClose={handleClose}
           onMenuItemClick={onContextMenuAction}
           anchorEl={anchorEl}

packages/web/src/components/ChooseConnectionSubstep/index.tsx

@@ -1,18 +1,21 @@
-import * as React from 'react';
-import { useQuery, useLazyQuery } from '@apollo/client';
-import TextField from '@mui/material/TextField';
+import { useLazyQuery, useQuery } from '@apollo/client';
+import Autocomplete from '@mui/material/Autocomplete';
 import Button from '@mui/material/Button';
 import Collapse from '@mui/material/Collapse';
 import ListItem from '@mui/material/ListItem';
-import Autocomplete from '@mui/material/Autocomplete';
+import TextField from '@mui/material/TextField';
+import * as React from 'react';
 
 import type { IApp, IConnection, IStep, ISubstep } from '@automatisch/types';
-import useFormatMessage from 'hooks/useFormatMessage';
-import { EditorContext } from 'contexts/Editor';
-import FlowSubstepTitle from 'components/FlowSubstepTitle';
 import AddAppConnection from 'components/AddAppConnection';
+import AppAuthClientsDialog from 'components/AppAuthClientsDialog/index.ee';
+import FlowSubstepTitle from 'components/FlowSubstepTitle';
+import useAppConfig from 'hooks/useAppConfig.ee';
+import { EditorContext } from 'contexts/Editor';
 import { GET_APP_CONNECTIONS } from 'graphql/queries/get-app-connections';
 import { TEST_CONNECTION } from 'graphql/queries/test-connection';
+import useAuthenticateApp from 'hooks/useAuthenticateApp.ee';
+import useFormatMessage from 'hooks/useFormatMessage';
 
 type ChooseConnectionSubstepProps = {
   application: IApp;
@@ -26,6 +29,7 @@ type ChooseConnectionSubstepProps = {
 };
 
 const ADD_CONNECTION_VALUE = 'ADD_CONNECTION';
+const ADD_SHARED_CONNECTION_VALUE = 'ADD_SHARED_CONNECTION';
 
 const optionGenerator = (
   connection: IConnection
@@ -53,11 +57,18 @@ function ChooseConnectionSubstep(
   const { connection, appKey } = step;
   const formatMessage = useFormatMessage();
   const editorContext = React.useContext(EditorContext);
+  const { authenticate } = useAuthenticateApp({
+    appKey: application.key,
+    useShared: true,
+  });
   const [showAddConnectionDialog, setShowAddConnectionDialog] =
     React.useState(false);
+  const [showAddSharedConnectionDialog, setShowAddSharedConnectionDialog] =
+    React.useState(false);
   const { data, loading, refetch } = useQuery(GET_APP_CONNECTIONS, {
     variables: { key: appKey },
   });
+  const { appConfig } = useAppConfig(application.key);
   // TODO: show detailed error when connection test/verification fails
   const [
     testConnection,
@@ -86,13 +97,49 @@ function ChooseConnectionSubstep(
         optionGenerator(connection)
       ) || [];
 
+    if (!appConfig || appConfig.canCustomConnect) {
       options.push({
         label: formatMessage('chooseConnectionSubstep.addNewConnection'),
         value: ADD_CONNECTION_VALUE,
       });
+    }
+
+    if (appConfig?.canConnect) {
+      options.push({
+        label: formatMessage('chooseConnectionSubstep.addNewSharedConnection'),
+        value: ADD_SHARED_CONNECTION_VALUE,
+      });
+    }
 
     return options;
-  }, [data, formatMessage]);
+  }, [data, formatMessage, appConfig]);
+
+  const handleClientClick = async (appAuthClientId: string) => {
+    try {
+      const response = await authenticate?.({
+        appAuthClientId,
+      });
+
+      const connectionId = response?.createConnection.id;
+
+      if (connectionId) {
+        await refetch();
+
+        onChange({
+          step: {
+            ...step,
+            connection: {
+              id: connectionId,
+            },
+          },
+        });
+      }
+    } catch (err) {
+      // void
+    } finally {
+      setShowAddSharedConnectionDialog(false);
+    }
+  };
 
   const { name } = substep;
 
@@ -131,6 +178,11 @@ function ChooseConnectionSubstep(
           return;
         }
 
+        if (connectionId === ADD_SHARED_CONNECTION_VALUE) {
+          setShowAddSharedConnectionDialog(true);
+          return;
+        }
+
         if (connectionId !== step.connection?.id) {
           onChange({
             step: {
@@ -216,6 +268,14 @@ function ChooseConnectionSubstep(
           application={application}
         />
       )}
+
+      {application && showAddSharedConnectionDialog && (
+        <AppAuthClientsDialog
+          appKey={application.key}
+          onClose={() => setShowAddSharedConnectionDialog(false)}
+          onClientClick={handleClientClick}
+        />
+      )}
     </React.Fragment>
   );
 }

packages/web/src/components/SplitButton/index.tsx

@@ -0,0 +1,116 @@
+import ArrowDropDownIcon from '@mui/icons-material/ArrowDropDown';
+import Button from '@mui/material/Button';
+import ButtonGroup from '@mui/material/ButtonGroup';
+import ClickAwayListener from '@mui/material/ClickAwayListener';
+import Grow from '@mui/material/Grow';
+import MenuItem from '@mui/material/MenuItem';
+import MenuList from '@mui/material/MenuList';
+import Paper from '@mui/material/Paper';
+import Popper from '@mui/material/Popper';
+import * as React from 'react';
+import { Link } from 'react-router-dom';
+
+type SplitButtonProps = {
+  options: {
+    key: string;
+    'data-test'?: string;
+    label: React.ReactNode;
+    to: string;
+  }[];
+  disabled?: boolean;
+  defaultActionIndex?: number;
+};
+
+export default function SplitButton(props: SplitButtonProps) {
+  const { options, disabled, defaultActionIndex = 0 } = props;
+  const [open, setOpen] = React.useState(false);
+  const anchorRef = React.useRef<HTMLDivElement>(null);
+
+  const multiOptions = options.length > 1;
+  const selectedOption = options[defaultActionIndex];
+
+  const handleToggle = () => {
+    setOpen((prevOpen) => !prevOpen);
+  };
+
+  const handleClose = (event: Event) => {
+    if (
+      anchorRef.current &&
+      anchorRef.current.contains(event.target as HTMLElement)
+    ) {
+      return;
+    }
+
+    setOpen(false);
+  };
+
+  return (
+    <React.Fragment>
+      <ButtonGroup
+        variant="contained"
+        ref={anchorRef}
+        aria-label="split button"
+        disabled={disabled}
+      >
+        <Button
+          size="large"
+          data-test={selectedOption['data-test']}
+          component={Link}
+          to={selectedOption.to}
+          sx={{
+            // Link component causes style loss in ButtonGroup
+            borderRadius: 0,
+            borderRight: '1px solid #bdbdbd',
+          }}
+        >
+          {selectedOption.label}
+        </Button>
+
+        {multiOptions && (
+          <Button size="small" onClick={handleToggle} sx={{ borderRadius: 0 }}>
+            <ArrowDropDownIcon />
+          </Button>
+        )}
+      </ButtonGroup>
+
+      {multiOptions && (
+        <Popper
+          sx={{
+            zIndex: 1,
+          }}
+          open={open}
+          anchorEl={anchorRef.current}
+          transition
+          disablePortal
+        >
+          {({ TransitionProps, placement }) => (
+            <Grow
+              {...TransitionProps}
+              style={{
+                transformOrigin:
+                  placement === 'bottom' ? 'center top' : 'center bottom',
+              }}
+            >
+              <Paper>
+                <ClickAwayListener onClickAway={handleClose}>
+                  <MenuList autoFocusItem>
+                    {options.map((option, index) => (
+                      <MenuItem
+                        key={option.key}
+                        selected={index === defaultActionIndex}
+                        component={Link}
+                        to={option.to}
+                      >
+                        {option.label}
+                      </MenuItem>
+                    ))}
+                  </MenuList>
+                </ClickAwayListener>
+              </Paper>
+            </Grow>
+          )}
+        </Popper>
+      )}
+    </React.Fragment>
+  );
+}

packages/web/src/config/urls.ts

@@ -20,13 +20,24 @@ export const APP_PATTERN = '/app/:appKey';
 export const APP_CONNECTIONS = (appKey: string) =>
   `/app/${appKey}/connections`;
 export const APP_CONNECTIONS_PATTERN = '/app/:appKey/connections';
-export const APP_ADD_CONNECTION = (appKey: string) =>
-  `/app/${appKey}/connections/add`;
+export const APP_ADD_CONNECTION = (appKey: string, shared = false) =>
+  `/app/${appKey}/connections/add?shared=${shared}`;
+export const APP_ADD_CONNECTION_WITH_AUTH_CLIENT_ID = (appKey: string, appAuthClientId: string) =>
+  `/app/${appKey}/connections/add?appAuthClientId=${appAuthClientId}`;
 export const APP_ADD_CONNECTION_PATTERN = '/app/:appKey/connections/add';
 export const APP_RECONNECT_CONNECTION = (
   appKey: string,
-  connectionId: string
-) => `/app/${appKey}/connections/${connectionId}/reconnect`;
+  connectionId: string,
+  appAuthClientId?: string,
+) => {
+  const path = `/app/${appKey}/connections/${connectionId}/reconnect`;
+
+  if (appAuthClientId) {
+    return `${path}?appAuthClientId=${appAuthClientId}`;
+  }
+
+  return path;
+};
 export const APP_RECONNECT_CONNECTION_PATTERN =
   '/app/:appKey/connections/:connectionId/reconnect';
 export const APP_FLOWS = (appKey: string) => `/app/${appKey}/flows`;

packages/web/src/graphql/queries/get-app-auth-client.ee.ts

@@ -0,0 +1,13 @@
+import { gql } from '@apollo/client';
+
+export const GET_APP_AUTH_CLIENT = gql`
+  query GetAppAuthClient($id: String!) {
+    getAppAuthClient(id: $id) {
+      id
+      appConfigId
+      name
+      active
+    }
+  }
+`;
+

packages/web/src/graphql/queries/get-app-auth-clients.ee.ts

@@ -0,0 +1,13 @@
+import { gql } from '@apollo/client';
+
+export const GET_APP_AUTH_CLIENTS = gql`
+  query GetAppAuthClients($appKey: String!, $active: Boolean) {
+    getAppAuthClients(appKey: $appKey, active: $active) {
+      id
+      appConfigId
+      name
+      active
+    }
+  }
+`;
+

packages/web/src/graphql/queries/get-app-config.ee.ts

@@ -0,0 +1,16 @@
+import { gql } from '@apollo/client';
+
+export const GET_APP_CONFIG = gql`
+  query GetAppConfig($key: String!) {
+    getAppConfig(key: $key) {
+      id
+      key
+      allowCustomConnection
+      canConnect
+      canCustomConnect
+      shared
+      disabled
+    }
+  }
+`;
+

packages/web/src/graphql/queries/get-app-connections.ts

@@ -7,6 +7,8 @@ export const GET_APP_CONNECTIONS = gql`
       connections {
         id
         key
+        reconnectable
+        appAuthClientId
         verified
         flowCount
         formattedData {

packages/web/src/graphql/queries/get-app.ts

@@ -39,6 +39,19 @@ export const GET_APP = gql`
             }
           }
         }
+        sharedAuthenticationSteps {
+          type
+          name
+          arguments {
+            name
+            value
+            type
+            properties {
+              name
+              value
+            }
+          }
+        }
         reconnectionSteps {
           type
           name
@@ -52,6 +65,19 @@ export const GET_APP = gql`
             }
           }
         }
+        sharedReconnectionSteps {
+          type
+          name
+          arguments {
+            name
+            value
+            type
+            properties {
+              name
+              value
+            }
+          }
+        }
       }
       connections {
         id

packages/web/src/graphql/queries/get-apps.ts

@@ -49,6 +49,19 @@ export const GET_APPS = gql`
             }
           }
         }
+        sharedAuthenticationSteps {
+          type
+          name
+          arguments {
+            name
+            value
+            type
+            properties {
+              name
+              value
+            }
+          }
+        }
         reconnectionSteps {
           type
           name
@@ -62,6 +75,19 @@ export const GET_APPS = gql`
             }
           }
         }
+        sharedReconnectionSteps {
+          type
+          name
+          arguments {
+            name
+            value
+            type
+            properties {
+              name
+              value
+            }
+          }
+        }
       }
       triggers {
         name

packages/web/src/helpers/authenticationSteps.ts

@@ -57,7 +57,9 @@ const processOpenWithPopup = (
     popup?.focus();
 
     const closeCheckIntervalId = setInterval(() => {
-      if (popup.closed) {
+      if (!popup) return;
+
+      if (popup?.closed) {
         clearInterval(closeCheckIntervalId);
         reject({ message: 'Error occured while verifying credentials!' });
       }

packages/web/src/hooks/useApp.ts

@@ -0,0 +1,26 @@
+import { useQuery } from '@apollo/client';
+import { IApp } from '@automatisch/types';
+
+import { GET_APP } from 'graphql/queries/get-app';
+
+type QueryResponse = {
+  getApp: IApp;
+}
+
+export default function useApp(key: string) {
+  const {
+    data,
+    loading
+  } = useQuery<QueryResponse>(
+    GET_APP,
+    {
+      variables: { key }
+    }
+  );
+  const app = data?.getApp;
+
+  return {
+    app,
+    loading,
+  };
+}

packages/web/src/hooks/useAppAuthClient.ee.ts

@@ -0,0 +1,31 @@
+import { useLazyQuery } from '@apollo/client';
+import { AppConfig } from '@automatisch/types';
+import * as React from 'react';
+
+import { GET_APP_AUTH_CLIENT } from 'graphql/queries/get-app-auth-client.ee';
+
+type QueryResponse = {
+  getAppAuthClient: AppConfig;
+}
+
+export default function useAppAuthClient(id: string) {
+  const [
+    getAppAuthClient,
+    {
+      data,
+      loading
+    }
+  ] = useLazyQuery<QueryResponse>(GET_APP_AUTH_CLIENT);
+  const appAuthClient = data?.getAppAuthClient;
+
+  React.useEffect(function fetchUponId() {
+    if (!id) return;
+
+    getAppAuthClient({ variables: { id } });
+  }, [id]);
+
+  return {
+    appAuthClient,
+    loading,
+  };
+}

packages/web/src/hooks/useAppAuthClients.ee.ts

@@ -0,0 +1,33 @@
+import { useLazyQuery } from '@apollo/client';
+import { AppAuthClient } from '@automatisch/types';
+import * as React from 'react';
+
+import { GET_APP_AUTH_CLIENTS } from 'graphql/queries/get-app-auth-clients.ee';
+
+type QueryResponse = {
+  getAppAuthClients: AppAuthClient[];
+}
+
+export default function useAppAuthClient(appKey: string) {
+  const [
+    getAppAuthClients,
+    {
+      data,
+      loading
+    }
+  ] = useLazyQuery<QueryResponse>(GET_APP_AUTH_CLIENTS, {
+    context: { autoSnackbar: false },
+  });
+  const appAuthClients = data?.getAppAuthClients;
+
+  React.useEffect(function fetchUponAppKey() {
+    if (!appKey) return;
+
+    getAppAuthClients({ variables: { appKey, active: true } });
+  }, [appKey]);
+
+  return {
+    appAuthClients,
+    loading,
+  };
+}

packages/web/src/hooks/useAppConfig.ee.ts

@@ -0,0 +1,27 @@
+import { useQuery } from '@apollo/client';
+import { AppConfig } from '@automatisch/types';
+
+import { GET_APP_CONFIG } from 'graphql/queries/get-app-config.ee';
+
+type QueryResponse = {
+  getAppConfig: AppConfig;
+}
+
+export default function useAppConfig(key: string) {
+  const {
+    data,
+    loading
+  } = useQuery<QueryResponse>(
+    GET_APP_CONFIG,
+    {
+      variables: { key },
+      context: { autoSnackbar: false }
+    }
+  );
+  const appConfig = data?.getAppConfig;
+
+  return {
+    appConfig,
+    loading,
+  };
+}

packages/web/src/hooks/useAuthenticateApp.ee.ts

@@ -0,0 +1,100 @@
+import { IApp } from '@automatisch/types';
+import * as React from 'react';
+
+import { processStep } from 'helpers/authenticationSteps';
+import computeAuthStepVariables from 'helpers/computeAuthStepVariables';
+import useApp from './useApp';
+
+type UseAuthenticateAppParams = {
+  appKey: string;
+  appAuthClientId?: string;
+  useShared?: boolean;
+  connectionId?: string;
+}
+
+type AuthenticatePayload = {
+  fields?: Record<string, string>;
+  appAuthClientId?: string;
+}
+
+function getSteps(auth: IApp['auth'], hasConnection: boolean, useShared: boolean) {
+  if (hasConnection) {
+    if (useShared) {
+      return auth?.sharedReconnectionSteps;
+    }
+
+    return auth?.reconnectionSteps;
+  }
+
+  if (useShared) {
+    return auth?.sharedAuthenticationSteps;
+  }
+
+  return auth?.authenticationSteps;
+}
+
+export default function useAuthenticateApp(payload: UseAuthenticateAppParams) {
+  const {
+    appKey,
+    appAuthClientId,
+    connectionId,
+    useShared = false,
+  } = payload;
+  const { app } = useApp(appKey);
+  const [
+    authenticationInProgress,
+    setAuthenticationInProgress
+  ] = React.useState(false);
+  const steps = getSteps(app?.auth, !!connectionId, useShared);
+
+  const authenticate = React.useMemo(() => {
+    if (!steps?.length) return;
+
+    return async function authenticate(payload: AuthenticatePayload = {}) {
+      const {
+        fields,
+      } = payload;
+      setAuthenticationInProgress(true);
+
+      const response: Record<string, any> = {
+        key: appKey,
+        appAuthClientId: appAuthClientId || payload.appAuthClientId,
+        connection: {
+          id: connectionId,
+        },
+        fields
+      };
+
+      let stepIndex = 0;
+      while (stepIndex < steps?.length) {
+        const step = steps[stepIndex];
+        const variables = computeAuthStepVariables(step.arguments, response);
+
+        try {
+          const stepResponse = await processStep(step, variables);
+
+          response[step.name] = stepResponse;
+        } catch (err) {
+          console.log(err);
+          throw err;
+
+          setAuthenticationInProgress(false);
+          break;
+        }
+
+        stepIndex++;
+
+        if (stepIndex === steps.length) {
+          return response;
+        }
+
+        setAuthenticationInProgress(false);
+      }
+    }
+  }, [steps, appKey, appAuthClientId, connectionId]);
+
+  return {
+    authenticate,
+    inProgress: authenticationInProgress,
+  };
+}

packages/web/src/locales/en.json

@@ -19,6 +19,7 @@
   "app.connectionCount": "{count} connections",
   "app.flowCount": "{count} flows",
   "app.addConnection": "Add connection",
+  "app.addCustomConnection": "Add custom connection",
   "app.reconnectConnection": "Reconnect connection",
   "app.createFlow": "Create flow",
   "app.settings": "Settings",
@@ -69,6 +70,7 @@
   "filterConditions.orContinueIf": "OR continue if…",
   "chooseConnectionSubstep.continue": "Continue",
   "chooseConnectionSubstep.addNewConnection": "Add new connection",
+  "chooseConnectionSubstep.addNewSharedConnection": "Add new shared connection",
   "chooseConnectionSubstep.chooseConnection": "Choose connection",
   "flow.createdAt": "created {datetime}",
   "flow.updatedAt": "updated {datetime}",
@@ -209,5 +211,6 @@
   "roleList.description": "Description",
   "permissionSettings.cancel": "Cancel",
   "permissionSettings.apply": "Apply",
-  "permissionSettings.title": "Conditions"
+  "permissionSettings.title": "Conditions",
+  "appAuthClientsDialog.title": "Choose your authentication client"
 }

packages/web/src/pages/Application/index.tsx

@@ -19,9 +19,11 @@ import Tab from '@mui/material/Tab';
 import AddIcon from '@mui/icons-material/Add';
 
 import useFormatMessage from 'hooks/useFormatMessage';
+import useAppConfig from 'hooks/useAppConfig.ee';
 import { GET_APP } from 'graphql/queries/get-app';
 import * as URLS from 'config/urls';
 
+import SplitButton from 'components/SplitButton';
 import ConditionalIconButton from 'components/ConditionalIconButton';
 import AppConnections from 'components/AppConnections';
 import AppFlows from 'components/AppFlows';
@@ -35,6 +37,13 @@ type ApplicationParams = {
   connectionId?: string;
 };
 
+type ConnectionOption = {
+  key: string;
+  label: string;
+  'data-test': string;
+  to: string;
+};
+
 const ReconnectConnection = (props: any): React.ReactElement => {
   const { application, onClose } = props;
   const { connectionId } = useParams() as ApplicationParams;
@@ -61,11 +70,36 @@ export default function Application(): React.ReactElement | null {
   const { appKey } = useParams() as ApplicationParams;
   const navigate = useNavigate();
   const { data, loading } = useQuery(GET_APP, { variables: { key: appKey } });
+  const { appConfig } = useAppConfig(appKey);
 
   const connectionId = searchParams.get('connectionId') || undefined;
   const goToApplicationPage = () => navigate('connections');
   const app = data?.getApp || {};
 
+  const connectionOptions = React.useMemo(() => {
+    const shouldHaveCustomConnection =
+      appConfig?.canConnect && appConfig?.canCustomConnect;
+    const options: ConnectionOption[] = [
+      {
+        label: formatMessage('app.addConnection'),
+        key: 'addConnection',
+        'data-test': 'add-connection-button',
+        to: URLS.APP_ADD_CONNECTION(appKey, appConfig?.canConnect),
+      },
+    ];
+
+    if (shouldHaveCustomConnection) {
+      options.push({
+        label: formatMessage('app.addCustomConnection'),
+        key: 'addCustomConnection',
+        'data-test': 'add-custom-connection-button',
+        to: URLS.APP_ADD_CONNECTION(appKey),
+      });
+    }
+
+    return options;
+  }, [appKey, appConfig]);
+
   if (loading) return null;
 
   return (
@@ -111,19 +145,14 @@ export default function Application(): React.ReactElement | null {
                 <Route
                   path={`${URLS.CONNECTIONS}/*`}
                   element={
-                    <ConditionalIconButton
-                      type="submit"
-                      variant="contained"
-                      color="primary"
-                      size="large"
-                      component={Link}
-                      to={URLS.APP_ADD_CONNECTION(appKey)}
-                      fullWidth
-                      icon={<AddIcon />}
-                      data-test="add-connection-button"
-                    >
-                      {formatMessage('app.addConnection')}
-                    </ConditionalIconButton>
+                    <SplitButton
+                      disabled={
+                        appConfig &&
+                        !appConfig?.canConnect &&
+                        !appConfig?.canCustomConnect
+                      }
+                      options={connectionOptions}
+                    />
                   }
                 />
               </Routes>