diff --git a/packages/backend/src/apps/slack2/auth/verify-credentials.ts b/packages/backend/src/apps/slack2/auth/verify-credentials.ts
index 0c29c0ad..1cd195c9 100644
--- a/packages/backend/src/apps/slack2/auth/verify-credentials.ts
+++ b/packages/backend/src/apps/slack2/auth/verify-credentials.ts
@@ -1,12 +1,13 @@
 import qs from 'qs';
+import { IGlobalVariableForConnection } from '../../../helpers/global-variable/connection';
 
-const verifyCredentials = async ($: any) => {
+const verifyCredentials = async ($: IGlobalVariableForConnection) => {
   const headers = {
     'Content-Type': 'application/x-www-form-urlencoded',
   };
 
   const stringifiedBody = qs.stringify({
-    token: $.auth.accessToken,
+    token: $.auth.data.accessToken,
   });
 
   const response = await $.http.post('/auth.test', stringifiedBody, {
@@ -24,7 +25,7 @@ const verifyCredentials = async ($: any) => {
   $.auth.set({
     botId,
     screenName,
-    token: $.auth.accessToken,
+    token: $.auth.data.accessToken,
   });
 
   return response.data;
diff --git a/packages/backend/src/helpers/global-variable/connection.ts b/packages/backend/src/helpers/global-variable/connection.ts
index 491b402e..45751283 100644
--- a/packages/backend/src/helpers/global-variable/connection.ts
+++ b/packages/backend/src/helpers/global-variable/connection.ts
@@ -1,15 +1,10 @@
 import createHttpClient from '../http-client';
 import Connection from '../../models/connection';
-import { IJSONObject, IApp } from '@automatisch/types';
-import { AxiosInstance as IHttpClient } from 'axios';
-
-type IGlobalVariableForConnection = {
-  auth: {
-    set: (args: IJSONObject) => Promise<Connection>;
-  };
-  app: IApp;
-  http: IHttpClient;
-};
+import {
+  IJSONObject,
+  IApp,
+  IGlobalVariableForConnection,
+} from '@automatisch/types';
 
 const prepareGlobalVariableForConnection = (
   connection: Connection,
@@ -18,16 +13,14 @@ const prepareGlobalVariableForConnection = (
   return {
     auth: {
       set: async (args: IJSONObject) => {
-        const persistedConnection = await connection.$query().patchAndFetch({
+        return await connection.$query().patchAndFetch({
           formattedData: {
             ...connection.formattedData,
             ...args,
           },
         });
-
-        return persistedConnection;
       },
-      ...connection.formattedData,
+      data: connection.formattedData,
     },
     app: appData,
     http: createHttpClient({ baseURL: appData.baseUrl }),
diff --git a/packages/backend/src/types/axios.d.ts b/packages/backend/src/types/axios.d.ts
deleted file mode 100644
index 948f46b4..00000000
--- a/packages/backend/src/types/axios.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-import { IJSONObject } from '@automatisch/types';
-
-declare module 'axios' {
-  interface AxiosResponse {
-    integrationError?: IJSONObject;
-  }
-}
diff --git a/packages/backend/tsconfig.json b/packages/backend/tsconfig.json
index 3888c0b7..0b471c36 100644
--- a/packages/backend/tsconfig.json
+++ b/packages/backend/tsconfig.json
@@ -9,23 +9,17 @@
     "noImplicitAny": true,
     "outDir": "dist",
     "paths": {
-      "*": [
-        "../../node_modules/*",
-        "node_modules/*",
-        "src/types/*"
-      ]
+      "*": ["../../node_modules/*", "node_modules/*", "src/types/*"]
     },
     "skipLibCheck": true,
     "sourceMap": true,
     "target": "es2021",
     "typeRoots": [
       "node_modules/@types",
+      "node_modules/@automatisch/types",
       "./src/types",
       "./src/apps"
     ]
   },
-  "include": [
-    "src/**/*",
-    "bin/**/*"
-  ]
+  "include": ["src/**/*", "bin/**/*"]
 }
diff --git a/packages/types/index.d.ts b/packages/types/index.d.ts
index 0168a9fc..b9cbacae 100644
--- a/packages/types/index.d.ts
+++ b/packages/types/index.d.ts
@@ -1,3 +1,6 @@
+import type { AxiosInstance } from 'axios';
+export type IHttpClient = AxiosInstance;
+
 // Type definitions for automatisch
 
 export type IJSONValue = string | number | boolean | IJSONObject | IJSONArray;
@@ -10,11 +13,11 @@ export interface IConnection {
   id: string;
   key: string;
   data: string;
-  formattedData: IJSONObject;
+  formattedData?: IJSONObject;
   userId: string;
   verified: boolean;
-  count: number;
-  flowCount: number;
+  count?: number;
+  flowCount?: number;
   appData?: IApp;
   createdAt: string;
 }
@@ -22,7 +25,7 @@ export interface IConnection {
 export interface IExecutionStep {
   id: string;
   executionId: string;
-  stepId: IStep["id"];
+  stepId: IStep['id'];
   step: IStep;
   dataIn: IJSONObject;
   dataOut: IJSONObject;
@@ -128,7 +131,7 @@ export interface IFieldText {
   dependsOn: string[];
 }
 
-type IField = IFieldDropdown | IFieldText;
+export type IField = IFieldDropdown | IFieldText;
 
 export interface IAuthenticationStepField {
   name: string;
@@ -190,4 +193,19 @@ export interface ISubstep {
 
 export type IHttpClientParams = {
   baseURL?: string;
+};
+
+export type IGlobalVariableForConnection = {
+  auth: {
+    set: (args: IJSONObject) => Promise<IConnection>;
+    data: IJSONObject;
+  };
+  app: IApp;
+  http: IHttpClient;
+};
+
+declare module 'axios' {
+  interface AxiosResponse {
+    integrationError?: IJSONObject;
+  }
 }