diff --git a/backend/src/graphql/resolver/UserResolver.test.ts b/backend/src/graphql/resolver/UserResolver.test.ts
index 36bae56de..58d697d8e 100644
--- a/backend/src/graphql/resolver/UserResolver.test.ts
+++ b/backend/src/graphql/resolver/UserResolver.test.ts
@@ -19,6 +19,8 @@ import { contributionLinkFactory } from '@/seeds/factory/contributionLink'
 import { ContributionLink } from '@model/ContributionLink'
 // import { TransactionLink } from '@entity/TransactionLink'
 
+import { EventProtocolType } from '@/event/EventProtocolType'
+import { EventProtocol } from '@entity/EventProtocol'
 import { logger } from '@test/testSetup'
 import { validate as validateUUID, version as versionUUID } from 'uuid'
 import { peterLustig } from '@/seeds/users/peter-lustig'
@@ -169,6 +171,14 @@ describe('UserResolver', () => {
           duration: expect.any(String),
         })
       })
+
+      it('stores the send confirmation event in the database', () => {
+        expect(EventProtocol.find()).resolves.toContainEqual(
+          expect.objectContaining({
+            type: EventProtocolType.SEND_CONFIRMATION_EMAIL,
+          }),
+        )
+      })
     })
 
     describe('email already exists', () => {
@@ -383,6 +393,10 @@ bei Gradidio sei dabei!`,
           }),
         )
       })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('Password entered is lexically invalid')
+      })
     })
 
     describe('no valid optin code', () => {
@@ -405,6 +419,10 @@ bei Gradidio sei dabei!`,
           }),
         )
       })
+
+      it('logs the error found', () => {
+        expect(logger.error).toBeCalledWith('Could not login with emailVerificationCode')
+      })
     })
   })
 
@@ -433,6 +451,10 @@ bei Gradidio sei dabei!`,
           }),
         )
       })
+
+      it('logs the error found', () => {
+        expect(logger.error).toBeCalledWith('User with email=bibi@bloxberg.de does not exist')
+      })
     })
 
     describe('user is in database and correct login data', () => {
@@ -475,6 +497,7 @@ bei Gradidio sei dabei!`,
     describe('user is in database and wrong password', () => {
       beforeAll(async () => {
         await userFactory(testEnv, bibiBloxberg)
+        result = await query({ query: login, variables: { ...variables, password: 'wrong' } })
       })
 
       afterAll(async () => {
@@ -482,14 +505,16 @@ bei Gradidio sei dabei!`,
       })
 
       it('returns an error', () => {
-        expect(
-          query({ query: login, variables: { ...variables, password: 'wrong' } }),
-        ).resolves.toEqual(
+        expect(result).toEqual(
           expect.objectContaining({
             errors: [new GraphQLError('No user with this credentials')],
           }),
         )
       })
+
+      it('logs the error thrown', () => {
+        expect(logger.error).toBeCalledWith('The User has no valid credentials.')
+      })
     })
   })
 
@@ -595,6 +620,14 @@ bei Gradidio sei dabei!`,
             }),
           )
         })
+
+        it('stores the login event in the database', () => {
+          expect(EventProtocol.find()).resolves.toContainEqual(
+            expect.objectContaining({
+              type: EventProtocolType.LOGIN,
+            }),
+          )
+        })
       })
     })
   })
@@ -649,13 +682,17 @@ bei Gradidio sei dabei!`,
       })
 
       describe('request reset password again', () => {
-        it('thows an error', async () => {
+        it('throws an error', async () => {
           await expect(mutate({ mutation: forgotPassword, variables })).resolves.toEqual(
             expect.objectContaining({
               errors: [new GraphQLError('email already sent less than 10 minutes minutes ago')],
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(`email already sent less than 10 minutes minutes ago`)
+        })
       })
     })
   })
@@ -766,7 +803,7 @@ bei Gradidio sei dabei!`,
       })
 
       describe('language is not valid', () => {
-        it('thows an error', async () => {
+        it('throws an error', async () => {
           await expect(
             mutate({
               mutation: updateUserInfos,
@@ -780,6 +817,10 @@ bei Gradidio sei dabei!`,
             }),
           )
         })
+
+        it('logs the error found', () => {
+          expect(logger.error).toBeCalledWith(`"not-valid" isn't a valid language`)
+        })
       })
 
       describe('password', () => {
@@ -799,6 +840,10 @@ bei Gradidio sei dabei!`,
               }),
             )
           })
+
+          it('logs the error found', () => {
+            expect(logger.error).toBeCalledWith(`Old password is invalid`)
+          })
         })
 
         describe('invalid new password', () => {
@@ -821,6 +866,10 @@ bei Gradidio sei dabei!`,
               }),
             )
           })
+
+          it('logs the error found', () => {
+            expect(logger.error).toBeCalledWith('newPassword does not fullfil the rules')
+          })
         })
 
         describe('correct old and new password', () => {
@@ -840,7 +889,7 @@ bei Gradidio sei dabei!`,
             )
           })
 
-          it('can login wtih new password', async () => {
+          it('can login with new password', async () => {
             await expect(
               query({
                 query: login,
@@ -860,7 +909,7 @@ bei Gradidio sei dabei!`,
             )
           })
 
-          it('cannot login wtih old password', async () => {
+          it('cannot login with old password', async () => {
             await expect(
               query({
                 query: login,
@@ -875,6 +924,10 @@ bei Gradidio sei dabei!`,
               }),
             )
           })
+
+          it('logs the error thrown', () => {
+            expect(logger.error).toBeCalledWith('The User has no valid credentials.')
+          })
         })
       })
     })
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index 3b7013323..2e2f5aeec 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -273,7 +273,7 @@ export class UserResolver {
     logger.info(`login with ${email}, ***, ${publisherId} ...`)
     email = email.trim().toLowerCase()
     const dbUser = await DbUser.findOneOrFail({ email }, { withDeleted: true }).catch(() => {
-      logger.error(`User with email=${email} does not exists`)
+      logger.error(`User with email=${email} does not exist`)
       throw new Error('No user with this credentials')
     })
     if (dbUser.deletedAt) {
@@ -389,7 +389,7 @@ export class UserResolver {
       /* uncomment this, when you need the activation link on the console */
       // In case EMails are disabled log the activation link for the user
       if (!emailSent) {
-        logger.debug(`Email not send!`)
+        logger.debug(`Email not sent!`)
       }
       logger.info('createUser() faked and send multi registration mail...')
 
@@ -548,6 +548,7 @@ export class UserResolver {
     logger.info(`setPassword(${code}, ***)...`)
     // Validate Password
     if (!isPassword(password)) {
+      logger.error('Password entered is lexically invalid')
       throw new Error(
         'Please enter a valid password with at least 8 characters, upper and lower case letters, at least one number and one special character!',
       )
@@ -727,6 +728,7 @@ export class UserResolver {
 
     try {
       await queryRunner.manager.save(userEntity).catch((error) => {
+        logger.error('error saving user: ' + error)
         throw new Error('error saving user: ' + error)
       })