diff --git a/backend/src/apis/KlicktippController.ts b/backend/src/apis/KlicktippController.ts
index 827144c13..7ff65a9f3 100644
--- a/backend/src/apis/KlicktippController.ts
+++ b/backend/src/apis/KlicktippController.ts
@@ -5,7 +5,7 @@ import CONFIG from '../config'
 
 const klicktippConnector = new KlicktippConnector()
 
-export const signin = async (
+export const signIn = async (
   email: string,
   language: string,
   firstName?: string,
@@ -52,18 +52,18 @@ export const logoutKlicktippUser = async (): Promise<boolean> => {
   return await klicktippConnector.logout()
 }
 
-export const untagUser = async (email: string, tagid: string): Promise<boolean> => {
+export const untagUser = async (email: string, tagId: string): Promise<boolean> => {
   const isLogin = await loginKlicktippUser()
   if (isLogin) {
-    return await klicktippConnector.untag(email, tagid)
+    return await klicktippConnector.untag(email, tagId)
   }
   throw new Error()
 }
 
-export const tagUser = async (email: string, tagids: string): Promise<boolean> => {
+export const tagUser = async (email: string, tagIds: string): Promise<boolean> => {
   const isLogin = await loginKlicktippUser()
   if (isLogin) {
-    return await klicktippConnector.tag(email, tagids)
+    return await klicktippConnector.tag(email, tagIds)
   }
   throw new Error()
 }
diff --git a/backend/src/graphql/resolvers/KlicktippResolver.ts b/backend/src/graphql/resolvers/KlicktippResolver.ts
index ba6bd5fcb..bc4d29e30 100644
--- a/backend/src/graphql/resolvers/KlicktippResolver.ts
+++ b/backend/src/graphql/resolvers/KlicktippResolver.ts
@@ -6,7 +6,7 @@ import {
   getKlickTippUser,
   getKlicktippTagMap,
   unsubscribe,
-  signin,
+  signIn,
 } from '../../apis/KlicktippController'
 import { SubscribeNewsletterArguments } from '../inputs/KlickTippInputs'
 
@@ -35,6 +35,6 @@ export class KlicktippResolver {
   async subscribeNewsletter(
     @Args() { email, language }: SubscribeNewsletterArguments,
   ): Promise<boolean> {
-    return await signin(email, language)
+    return await signIn(email, language)
   }
 }