diff --git a/backend/src/apis/loginAPI.ts b/backend/src/apis/loginAPI.ts
index 1aa6cace1..7160db68c 100644
--- a/backend/src/apis/loginAPI.ts
+++ b/backend/src/apis/loginAPI.ts
@@ -11,10 +11,10 @@ export const apiPost = async (url: string, payload: unknown): Promise<any> => {
       if (result.data.state !== 'success') {
         throw new Error(result.data.msg)
       }
-      return { success: true, result }
+      return { success: true, data: result.data }
     })
     .catch((error) => {
-      return { success: false, result: error }
+      return { success: false, data: error.message }
     })
 }
 
@@ -29,11 +29,11 @@ export const apiGet = async (url: string): Promise<any> => {
       if (!['success', 'warning'].includes(result.data.state)) {
         throw new Error(result.data.msg)
       }
-      return { success: true, result: result }
+      return { success: true, data: result.data }
     })
     .catch((error) => {
       // eslint-disable-next-line no-console
       console.log('IN apiGet.ERROR: ' + JSON.stringify({ success: false, result: error }))
-      return { success: false, result: error }
+      return { success: false, data: error.message }
     })
 }
diff --git a/backend/src/graphql/inputs/TransactionInput.ts b/backend/src/graphql/inputs/TransactionInput.ts
index 279e09dd6..db010390a 100644
--- a/backend/src/graphql/inputs/TransactionInput.ts
+++ b/backend/src/graphql/inputs/TransactionInput.ts
@@ -1,5 +1,4 @@
-import { ObjectType, ArgsType, Field, Int, Float } from 'type-graphql'
-import { Entity, BaseEntity, Column, Double } from 'typeorm'
+import { ArgsType, Field } from 'type-graphql'
 
 @ArgsType()
 export class TransactionInput {
diff --git a/backend/src/graphql/models/Balance.ts b/backend/src/graphql/models/Balance.ts
index 2ba34ec75..ceb479b9c 100644
--- a/backend/src/graphql/models/Balance.ts
+++ b/backend/src/graphql/models/Balance.ts
@@ -1,10 +1,11 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
 import { Entity, BaseEntity, Column } from 'typeorm'
 import { ObjectType, Field } from 'type-graphql'
 
 @Entity()
 @ObjectType()
 export class Balance extends BaseEntity {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
   constructor(json: any) {
     super()
     this.balance = json.balance
diff --git a/backend/src/graphql/models/BaseResponse.ts b/backend/src/graphql/models/BaseResponse.ts
new file mode 100644
index 000000000..712660bd3
--- /dev/null
+++ b/backend/src/graphql/models/BaseResponse.ts
@@ -0,0 +1,9 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class BaseResponse extends BaseEntity {
+  @Field(() => Boolean)
+  success: boolean
+}
diff --git a/backend/src/graphql/models/ChangePasswordResponse.ts b/backend/src/graphql/models/ChangePasswordResponse.ts
new file mode 100644
index 000000000..1ba3247cd
--- /dev/null
+++ b/backend/src/graphql/models/ChangePasswordResponse.ts
@@ -0,0 +1,9 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class ChangePasswordResponse extends BaseEntity {
+  @Field(() => String)
+  state: string
+}
diff --git a/backend/src/graphql/models/CheckUsernameResponse.ts b/backend/src/graphql/models/CheckUsernameResponse.ts
new file mode 100644
index 000000000..ac51b64e1
--- /dev/null
+++ b/backend/src/graphql/models/CheckUsernameResponse.ts
@@ -0,0 +1,15 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class CheckUsernameResponse extends BaseEntity {
+  @Field(() => String)
+  state: string
+
+  @Field(() => String)
+  msg?: string
+
+  @Field(() => Number)
+  groupId?: number
+}
diff --git a/backend/src/graphql/models/CreateResponse.ts b/backend/src/graphql/models/CreateResponse.ts
new file mode 100644
index 000000000..54276b031
--- /dev/null
+++ b/backend/src/graphql/models/CreateResponse.ts
@@ -0,0 +1,14 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class CreateResponse extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.state = json.state
+  }
+
+  @Field(() => String)
+  state: string
+}
diff --git a/backend/src/graphql/models/LoginResponse.ts b/backend/src/graphql/models/LoginResponse.ts
new file mode 100644
index 000000000..2abe1ef96
--- /dev/null
+++ b/backend/src/graphql/models/LoginResponse.ts
@@ -0,0 +1,25 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+import { Entity, BaseEntity, Column } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+import { User } from './User'
+
+// temporaray solution until we have JWT implemented
+
+@Entity()
+@ObjectType()
+export class LoginResponse extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.sessionId = json.session_id
+    this.user = new User(json.user)
+  }
+
+  @Field(() => Number)
+  @Column()
+  sessionId: number
+
+  @Field(() => User)
+  @Column()
+  user: User
+}
diff --git a/backend/src/graphql/models/LoginViaVerificationCode.ts b/backend/src/graphql/models/LoginViaVerificationCode.ts
new file mode 100644
index 000000000..bd0d66781
--- /dev/null
+++ b/backend/src/graphql/models/LoginViaVerificationCode.ts
@@ -0,0 +1,22 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
+import { Entity, BaseEntity, Column } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class LoginViaVerificationCode extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.sessionId = json.session_id
+    this.email = json.user.email
+  }
+
+  @Field(() => Number)
+  @Column()
+  sessionId: number
+
+  @Field(() => String)
+  @Column()
+  email: string
+}
diff --git a/backend/src/graphql/models/SendEmailResponse.ts b/backend/src/graphql/models/SendEmailResponse.ts
new file mode 100644
index 000000000..d8e163478
--- /dev/null
+++ b/backend/src/graphql/models/SendEmailResponse.ts
@@ -0,0 +1,18 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class SendEmailResponse extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.state = json.state
+    this.msg = json.msg
+  }
+
+  @Field(() => String)
+  state: string
+
+  @Field(() => String)
+  msg?: string
+}
diff --git a/backend/src/graphql/models/Server.ts b/backend/src/graphql/models/Server.ts
new file mode 100644
index 000000000..e722a2c97
--- /dev/null
+++ b/backend/src/graphql/models/Server.ts
@@ -0,0 +1,14 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class Server extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.loginServerPath = json.login_server_path
+  }
+
+  @Field(() => String)
+  loginServerPath: string
+}
diff --git a/backend/src/graphql/models/UpdateUserInfosResponse.ts b/backend/src/graphql/models/UpdateUserInfosResponse.ts
new file mode 100644
index 000000000..14f834932
--- /dev/null
+++ b/backend/src/graphql/models/UpdateUserInfosResponse.ts
@@ -0,0 +1,15 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+
+@Entity()
+@ObjectType()
+export class UpdateUserInfosResponse extends BaseEntity {
+  @Field(() => String)
+  state: string
+
+  @Field(() => Number)
+  validValues: number
+
+  @Field(() => [String])
+  errors: [string]
+}
diff --git a/backend/src/graphql/models/User.ts b/backend/src/graphql/models/User.ts
index b935871d1..68543bf09 100644
--- a/backend/src/graphql/models/User.ts
+++ b/backend/src/graphql/models/User.ts
@@ -1,3 +1,5 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
 import { Entity, BaseEntity, Column } from 'typeorm'
 import { ObjectType, Field } from 'type-graphql'
 
@@ -9,6 +11,15 @@ export class User extends BaseEntity {
   @PrimaryGeneratedColumn()
   id: number
   */
+  constructor(json: any) {
+    super()
+    this.email = json.email
+    this.firstName = json.first_name
+    this.lastName = json.last_name
+    this.username = json.username
+    this.description = json.description
+    this.language = json.language
+  }
 
   @Field(() => String)
   @Column({ length: 191 })
@@ -70,115 +81,3 @@ export class User extends BaseEntity {
   publisherId: number
   */
 }
-
-// temporaray solution until we have JWT implemented
-@Entity()
-@ObjectType()
-export class LoginResponse extends BaseEntity {
-  @Field(() => Number)
-  @Column()
-  sessionId: number
-
-  @Field(() => User)
-  @Column()
-  user: User
-}
-
-@Entity()
-@ObjectType()
-export class LoginViaVerificationCode extends BaseEntity {
-  @Field(() => Number)
-  @Column()
-  sessionId: number
-
-  @Field(() => String)
-  @Column()
-  email: string
-}
-
-@Entity()
-@ObjectType()
-export class LogoutResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-}
-
-@Entity()
-@ObjectType()
-export class CreateResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-}
-
-@Entity()
-@ObjectType()
-export class SendEmailResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-
-  @Field(() => String)
-  msg?: string
-}
-
-@Entity()
-@ObjectType()
-export class Server extends BaseEntity {
-  @Field(() => String)
-  loginServerPath: string
-}
-
-@Entity()
-@ObjectType()
-export class ErrorData extends BaseEntity {
-  @Field(() => String)
-  messages: string
-}
-
-@Entity()
-@ObjectType()
-export class GetUserInfoResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-
-  @Field(() => User)
-  userData: User
-
-  @Field(() => Server)
-  server: Server
-
-  @Field(() => [ErrorData])
-  errors: [ErrorData]
-}
-
-@Entity()
-@ObjectType()
-export class ChangePasswordResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-}
-
-@Entity()
-@ObjectType()
-export class UpdateUserInfosResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-
-  @Field(() => Number)
-  validValues: number
-
-  @Field(() => [ErrorData])
-  errors: [ErrorData]
-}
-
-@Entity()
-@ObjectType()
-export class CheckUsernameResponse extends BaseEntity {
-  @Field(() => String)
-  state: string
-
-  @Field(() => String)
-  msg?: string
-
-  @Field(() => Number)
-  groupId?: number
-}
diff --git a/backend/src/graphql/models/UserInfoData.ts b/backend/src/graphql/models/UserInfoData.ts
new file mode 100644
index 000000000..46b336d5e
--- /dev/null
+++ b/backend/src/graphql/models/UserInfoData.ts
@@ -0,0 +1,38 @@
+import { Entity, BaseEntity } from 'typeorm'
+import { ObjectType, Field } from 'type-graphql'
+import { Server } from './Server'
+import { User } from './User'
+
+@Entity()
+@ObjectType()
+export class UserInfoData extends BaseEntity {
+  constructor(json: any) {
+    super()
+    this.state = json.state
+    this.userData = new User(json.user_data)
+    this.server = new Server(json.server)
+    this.errors = json.errors
+  }
+
+  @Field(() => String)
+  state: string
+
+  @Field(() => User)
+  userData: User
+
+  @Field(() => Server)
+  server: Server
+
+  @Field(() => [String])
+  errors: [string]
+}
+
+@Entity()
+@ObjectType()
+export class GetUserInfoResponse extends BaseEntity {
+  @Field(() => Boolean)
+  success: boolean
+
+  @Field(() => UserInfoData)
+  data: UserInfoData
+}
diff --git a/backend/src/graphql/resolvers/CommunityTransactionResolver.ts b/backend/src/graphql/resolvers/CommunityTransactionResolver.ts
index 7eb7a9921..1fcc214e7 100644
--- a/backend/src/graphql/resolvers/CommunityTransactionResolver.ts
+++ b/backend/src/graphql/resolvers/CommunityTransactionResolver.ts
@@ -41,7 +41,7 @@ export class CommunityTransactionResolver {
   }
 
   @Query(() => String)
-  async create(
+  async createCoins(
     @Args() { sessionId, email, amount, memo, targetDate = new Date() }: TransactionCreateArgs,
   ): Promise<any> {
     const payload = {
diff --git a/backend/src/graphql/resolvers/UserResolver.ts b/backend/src/graphql/resolvers/UserResolver.ts
index 723f7539e..d22dd49ac 100644
--- a/backend/src/graphql/resolvers/UserResolver.ts
+++ b/backend/src/graphql/resolvers/UserResolver.ts
@@ -1,17 +1,14 @@
 // import jwt from 'jsonwebtoken'
 import { Resolver, Query, /* Mutation, */ Args, Arg } from 'type-graphql'
 import CONFIG from '../../config'
-import {
-  ChangePasswordResponse,
-  CheckUsernameResponse,
-  CreateResponse,
-  GetUserInfoResponse,
-  LoginResponse,
-  LoginViaVerificationCode,
-  LogoutResponse,
-  SendEmailResponse,
-  UpdateUserInfosResponse,
-} from '../models/User'
+import { ChangePasswordResponse } from '../models/ChangePasswordResponse'
+import { CheckUsernameResponse } from '../models/CheckUsernameResponse'
+import { CreateResponse } from '../models/CreateResponse'
+import { GetUserInfoResponse } from '../models/UserInfoData'
+import { LoginResponse } from '../models/LoginResponse'
+import { LoginViaVerificationCode } from '../models/LoginViaVerificationCode'
+import { SendEmailResponse } from '../models/SendEmailResponse'
+import { UpdateUserInfosResponse } from '../models/UpdateUserInfosResponse'
 import {
   ChangePasswordArgs,
   CheckUsernameArgs,
@@ -27,27 +24,17 @@ import { apiPost, apiGet } from '../../apis/loginAPI'
 export class UserResolver {
   @Query(() => LoginResponse)
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  async login(@Args() { email, password }: UnsecureLoginArgs): Promise<any> {
+  async login(@Args() { email, password }: UnsecureLoginArgs): Promise<LoginResponse> {
     email = email.trim().toLowerCase()
     const result = await apiPost(CONFIG.LOGIN_API_URL + 'unsecureLogin', { email, password })
 
     // if there is no user, throw an authentication error
     if (!result.success) {
-      throw new Error(result.result)
+      throw new Error(result.data)
     }
 
     // temporary solution until we have JWT implemented
-    return {
-      sessionId: result.result.data.session_id,
-      user: {
-        email: result.result.data.user.email,
-        language: result.result.data.user.language,
-        username: result.result.data.user.username,
-        firstName: result.result.data.user.first_name,
-        lastName: result.result.data.user.last_name,
-        description: result.result.data.user.description,
-      },
-    }
+    return new LoginResponse(result.data)
 
     // create and return the json web token
     // The expire doesn't help us here. The client needs to track when the token expires on its own,
@@ -65,29 +52,35 @@ export class UserResolver {
 
   @Query(() => LoginViaVerificationCode)
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  async loginViaEmailVerificationCode(@Arg('optin') optin: string): Promise<any> {
+  async loginViaEmailVerificationCode(
+    @Arg('optin') optin: string,
+  ): Promise<LoginViaVerificationCode> {
     // I cannot use number as type here.
     // The value received is not the same as sent by the query
     const result = await apiGet(
       CONFIG.LOGIN_API_URL + 'loginViaEmailVerificationCode?emailVerificationCode=' + optin,
     )
-    if (result.success)
-      return {
-        sessionId: result.result.data.session_id,
-        email: result.result.data.user.email,
-      }
-    return result.result
+    if (!result.success) {
+      throw new Error(result.data)
+    }
+    return new LoginViaVerificationCode(result.data)
   }
 
-  @Query(() => LogoutResponse)
-  async logout(@Arg('sessionId') sessionId: number): Promise<any> {
+  /* @Query(() => LogoutResponse)
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  async logout(@Arg('sessionId') sessionId: number): Promise<LogoutResponse> {
     const payload = { session_id: sessionId }
-    const result = apiPost(CONFIG.LOGIN_API_URL + 'logout', payload);
-    return result
+    const result = apiPost(CONFIG.LOGIN_API_URL + 'logout', payload)
+    if (!result.success) {
+      throw new Error(result.data)
+    }
+    return result.data
   }
-
+*/
   @Query(() => CreateResponse)
-  async create(@Args() { email, firstName, lastName, password }: CreateUserArgs): Promise<any> {
+  async create(
+    @Args() { email, firstName, lastName, password }: CreateUserArgs,
+  ): Promise<CreateResponse> {
     const payload = {
       email,
       first_name: firstName,
@@ -96,7 +89,11 @@ export class UserResolver {
       emailType: 2,
       login_after_register: true,
     }
-    return apiPost(CONFIG.LOGIN_API_URL + 'createUser', payload)
+    const result = await apiPost(CONFIG.LOGIN_API_URL + 'createUser', payload)
+    if (!result.success) {
+      throw new Error(result.data)
+    }
+    return new CreateResponse(result.data)
   }
 
   @Query(() => SendEmailResponse)
diff --git a/backend/src/graphql/resolvers/helpers/MapVariableToColumnName.ts b/backend/src/graphql/resolvers/helpers/MapVariableToColumnName.ts
new file mode 100644
index 000000000..e69de29bb