feat: Create credentials model and graphQL mutation

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

@@ -0,0 +1,37 @@
+import { GraphQLString, GraphQLNonNull, GraphQLObjectType, GraphQLCompositeType } from 'graphql';
+import Credential from '../../models/credential';
+import credentialType from '../types/credential';
+import twitterCredentialInputType from '../types/twitter-credential-input';
+import User from '../../models/user';
+
+type Params = {
+  key: string,
+  displayName: string,
+  data: object
+}
+const createCredentialResolver = async (params: Params) => {
+  const user = await User.query().findOne({
+    email: 'user@automatisch.com'
+  })
+
+  const credential = await Credential.query().insert({
+    displayName: params.displayName,
+    key: params.key,
+    data: params.data,
+    userId: user.id
+  });
+
+  return credential;
+}
+
+const createCredential = {
+  type: credentialType,
+  args: {
+    key: { type: GraphQLNonNull(GraphQLString) },
+    displayName: { type: GraphQLNonNull(GraphQLString) },
+    data: { type: GraphQLNonNull(twitterCredentialInputType) }
+  },
+  resolve: (_: any, params: Params) => createCredentialResolver(params)
+};
+
+export default createCredential;