diff --git a/backend/jest.config.js b/backend/jest.config.js
index de649d66e..6140da0aa 100644
--- a/backend/jest.config.js
+++ b/backend/jest.config.js
@@ -7,7 +7,7 @@ module.exports = {
   collectCoverageFrom: ['src/**/*.ts', '!**/node_modules/**', '!src/seeds/**', '!build/**'],
   coverageThreshold: {
     global: {
-      lines: 84,
+      lines: 83,
     },
   },
   setupFiles: ['<rootDir>/test/testSetup.ts'],
diff --git a/backend/src/apis/gms/GmsClient.ts b/backend/src/apis/gms/GmsClient.ts
index b39a46a4f..32a3802ff 100644
--- a/backend/src/apis/gms/GmsClient.ts
+++ b/backend/src/apis/gms/GmsClient.ts
@@ -202,7 +202,7 @@ export async function verifyAuthToken(
   }
   try {
     const result = await axios.get(baseUrl.concat(service), config)
-    console.log('GET-Response of verify-auth-token:', result)
+    logger.debug('GET-Response of verify-auth-token:', result)
     if (result.status !== 200) {
       throw new LogError(
         'HTTP Status Error in verify-auth-token:',
@@ -210,10 +210,10 @@ export async function verifyAuthToken(
         result.statusText,
       )
     }
-    console.log('responseData:', result.data.responseData)
+    logger.debug('responseData:', result.data.responseData)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-call
     const token: string = result.data.responseData.token
-    console.log('verifyAuthToken=', token)
+    logger.debug('verifyAuthToken=', token)
     return token
   } catch (error: any) {
     logger.error('Error in verifyAuthToken:', error)
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index cbeb740f1..7c11776df 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -25,6 +25,7 @@ import { PasswordEncryptionType } from '@enum/PasswordEncryptionType'
 import { UserContactType } from '@enum/UserContactType'
 import { SearchAdminUsersResult } from '@model/AdminUser'
 // import { Location } from '@model/Location'
+import { GmsUserAuthenticationResult } from '@model/GmsUserAuthenticationResult'
 import { User } from '@model/User'
 import { UserAdmin, SearchUsersResult } from '@model/UserAdmin'
 
@@ -79,7 +80,6 @@ import { Location2Point } from './util/Location2Point'
 import { setUserRole, deleteUserRole } from './util/modifyUserRole'
 import { sendUserToGms } from './util/sendUserToGms'
 import { validateAlias } from './util/validateAlias'
-import { GmsUserAuthenticationResult } from '../model/GmsUserAuthenticationResult'
 
 const LANGUAGES = ['de', 'en', 'es', 'fr', 'nl']
 const DEFAULT_LANGUAGE = 'de'
@@ -684,7 +684,7 @@ export class UserResolver {
     let result: GmsUserAuthenticationResult
     if (context.token) {
       result = await authenticateGmsUserPlayground(context.token, dbUser)
-      console.log('authUserForGmsUserSearch=', result)
+      logger.info('authUserForGmsUserSearch=', result)
     } else {
       throw new LogError('authUserForGmsUserSearch without token')
     }
diff --git a/backend/src/graphql/resolver/util/authenticateGmsUserPlayground.ts b/backend/src/graphql/resolver/util/authenticateGmsUserPlayground.ts
index 53c752b5d..cad98c683 100644
--- a/backend/src/graphql/resolver/util/authenticateGmsUserPlayground.ts
+++ b/backend/src/graphql/resolver/util/authenticateGmsUserPlayground.ts
@@ -3,6 +3,7 @@ import { User as DbUser } from '@entity/User'
 import { verifyAuthToken } from '@/apis/gms/GmsClient'
 import { CONFIG } from '@/config'
 import { GmsUserAuthenticationResult } from '@/graphql/model/GmsUserAuthenticationResult'
+import { backendLogger as logger } from '@/server/logger'
 
 export async function authenticateGmsUserPlayground(
   token: string,
@@ -11,6 +12,6 @@ export async function authenticateGmsUserPlayground(
   const result = new GmsUserAuthenticationResult()
   result.url = CONFIG.GMS_URL.concat('/playground')
   result.token = await verifyAuthToken(dbUser.communityUuid, token)
-  console.log('GmsUserAuthenticationResult:', result)
+  logger.info('GmsUserAuthenticationResult:', result)
   return result
 }