diff --git a/README.md b/README.md
index fe6f2e7f3..ead54701c 100644
--- a/README.md
+++ b/README.md
@@ -8,33 +8,73 @@ The Gradido model can create global prosperity and peace
 The Corona crisis has fundamentally changed our world within a very short time.
 The dominant financial system threatens to fail around the globe, followed by mass insolvencies, record unemployment and abject poverty. Only with a sustainable new monetary system can humanity master these challenges of the 21st century. The Gradido Academy for Bionic Economy has developed such a system.
 
+Find out more about the Project on its [Website](https://gradido.net/). It is offering vast resources about the idea. The remaining document will discuss the gradido software only.
 ## Software requirements
 
-Currently we only support `docker` as environment to run all services, since many different programming languages and frameworks are used.
+Currently we only support `docker` install instructions to run all services, since many different programming languages and frameworks are used.
 
-- [docker](https://www.docker.com/)
+- [docker](https://www.docker.com/) 
+- [docker-compose]
+
+### For Arch Linux
+Install the required packages:
+```bash
+sudo pacman -S docker
+sudo pacman -S docker-compose
+```
+
+Add group `docker` and then your user to it in order to allow you to run docker without sudo 
+```bash
+sudo groupadd docker # may already exist `groupadd: group 'docker' already exists`
+sudo usermod -aG docker $USER
+groups # verify you have the group (requires relog)
+```
+
+Start the docker service:
+```bash
+sudo systemctrl start docker
+```
 
 ## How to run?
 
-1. Clone the repo and pull all submodules
-
+### 1. Clone Sources
+Clone the repo and pull all submodules
 ```bash
 git clone git@github.com:gradido/gradido.git
 git submodule update --recursive --init
 ```
 
-2. Run docker compose
-    1. Run docker compose for the debug build
+### 2. Run docker-compose
+Run docker-compose to bring up the development environment 
+```bash
+docker-compose up
+```
+### Additional Build options
+If you want to build for production you can do this aswell:
+```bash
+docker-compose -f docker-compose.yml up
+```
 
-    ```bash
-    docker-compose up
-    ```
+## Services defined in this package
 
-   2. Or run docker compose in production build
+- [frontend](./frontend) Wallet frontend
+- [backend](./backend) GraphQL & Business logic backend
+- [mariadb](./mariadb) Database backend
+- [login_server](./login_server) User credential storage & business logic backend
+- [community_server](./community_server/) Business logic backend
 
-    ```bash
-    docker-compose -f docker-compose.yml up
-    ```
+We are currently restructuring the service to reduce dependencies and unify business logic into one place. Furthermore the databases defined for each service will be unified into one.
+
+### Open the wallet
+
+Once you have `docker-compose` up and running, you can open [http://localhost/vue](http://localhost/vue) and create yourself a new wallet account.
+
+## Troubleshooting
+
+| Problem | Issue | Solution | Description |
+| ------- | ----- | -------- | ----------- |
+| docker-compose raises database connection errors | [#1062](https://github.com/gradido/gradido/issues/1062) | End `ctrl+c` and restart the `docker-compose up` after a successful build | Several Database connection related errors occur in the docker-compose log. |
+| Wallet page is empty | [#1063](https://github.com/gradido/gradido/issues/1063) | Accept Cookies and Local Storage in your Browser | The page stays empty when navigating to [http://localhost/vue](http://localhost/vue) |
 
 ## Useful Links
 
diff --git a/backend/src/graphql/arg/CheckUsernameArgs.ts b/backend/src/graphql/arg/CheckUsernameArgs.ts
index 6aaed6d0b..64265b64e 100644
--- a/backend/src/graphql/arg/CheckUsernameArgs.ts
+++ b/backend/src/graphql/arg/CheckUsernameArgs.ts
@@ -4,7 +4,4 @@ import { ArgsType, Field } from 'type-graphql'
 export default class CheckUsernameArgs {
   @Field(() => String)
   username: string
-
-  @Field(() => Number, { nullable: true })
-  groupId?: number
 }
diff --git a/backend/src/graphql/model/CheckUsernameResponse.ts b/backend/src/graphql/model/CheckUsernameResponse.ts
deleted file mode 100644
index b3186ffcf..000000000
--- a/backend/src/graphql/model/CheckUsernameResponse.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
-/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
-import { ObjectType, Field } from 'type-graphql'
-
-@ObjectType()
-export class CheckUsernameResponse {
-  constructor(json: any) {
-    this.state = json.state
-    this.msg = json.msg
-    this.groupId = json.group_id
-  }
-
-  @Field(() => String)
-  state: string
-
-  @Field(() => String)
-  msg?: string
-
-  @Field(() => Number)
-  groupId?: number
-}
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index 33949197c..f6eccd7e8 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -3,8 +3,8 @@
 
 import { Resolver, Query, Args, Arg, Authorized, Ctx, UseMiddleware, Mutation } from 'type-graphql'
 import { from_hex as fromHex } from 'libsodium-wrappers'
+import { getCustomRepository } from 'typeorm'
 import CONFIG from '../../config'
-import { CheckUsernameResponse } from '../model/CheckUsernameResponse'
 import { LoginViaVerificationCode } from '../model/LoginViaVerificationCode'
 import { SendPasswordResetEmailResponse } from '../model/SendPasswordResetEmailResponse'
 import { UpdateUserInfosResponse } from '../model/UpdateUserInfosResponse'
@@ -22,10 +22,10 @@ import {
   klicktippNewsletterStateMiddleware,
 } from '../../middleware/klicktippMiddleware'
 import { CheckEmailResponse } from '../model/CheckEmailResponse'
-import { getCustomRepository } from 'typeorm'
 import { UserSettingRepository } from '../../typeorm/repository/UserSettingRepository'
 import { Setting } from '../enum/Setting'
 import { UserRepository } from '../../typeorm/repository/User'
+import { LoginUser } from '@entity/LoginUser'
 
 @Resolver()
 export class UserResolver {
@@ -275,15 +275,27 @@ export class UserResolver {
     return response
   }
 
-  @Query(() => CheckUsernameResponse)
-  async checkUsername(
-    @Args() { username, groupId = 1 }: CheckUsernameArgs,
-  ): Promise<CheckUsernameResponse> {
-    const response = await apiGet(
-      CONFIG.LOGIN_API_URL + `checkUsername?username=${username}&group_id=${groupId}`,
-    )
-    if (!response.success) throw new Error(response.data)
-    return new CheckUsernameResponse(response.data)
+  @Query(() => Boolean)
+  async checkUsername(@Args() { username }: CheckUsernameArgs): Promise<boolean> {
+    // Username empty?
+    if (username === '') {
+      throw new Error('Username must be set.')
+    }
+
+    // Do we fullfil the minimum character length?
+    const MIN_CHARACTERS_USERNAME = 2
+    if (username.length < MIN_CHARACTERS_USERNAME) {
+      throw new Error(`Username must be at minimum ${MIN_CHARACTERS_USERNAME} characters long.`)
+    }
+
+    const usersFound = await LoginUser.count({ username })
+
+    // Username already present?
+    if (usersFound !== 0) {
+      throw new Error(`Username "${username}" already taken.`)
+    }
+
+    return true
   }
 
   @Query(() => CheckEmailResponse)
diff --git a/database/entity/0003-login_server_tables/LoginUser.ts b/database/entity/0003-login_server_tables/LoginUser.ts
new file mode 100644
index 000000000..26614b4db
--- /dev/null
+++ b/database/entity/0003-login_server_tables/LoginUser.ts
@@ -0,0 +1,56 @@
+import { BaseEntity, Entity, PrimaryGeneratedColumn, Column } from 'typeorm'
+
+// Moriz: I do not like the idea of having two user tables
+@Entity('login_users')
+export class LoginUser extends BaseEntity {
+  @PrimaryGeneratedColumn('increment', { unsigned: true })
+  id: number
+
+  @Column({ length: 191, unique: true })
+  email: string
+
+  @Column({ name: 'first_name', length: 150 })
+  firstName: string
+
+  @Column({ name: 'last_name', length: 255, default: '' })
+  lastName: string
+
+  @Column({ length: 255, default: '' })
+  username: string
+
+  @Column({ default: '' })
+  description: string
+
+  @Column({ type: 'bigint', default: 0, unsigned: true })
+  password: string
+
+  @Column({ name: 'pubkey', type: 'binary', length: 32, default: null, nullable: true })
+  pubKey: Buffer
+
+  @Column({ name: 'privkey', type: 'binary', length: 80, default: null, nullable: true })
+  privKey: Buffer
+
+  @Column({ name: 'email_hash', type: 'binary', length: 32, default: null, nullable: true })
+  emailHash: Buffer
+
+  @Column({ name: 'created', default: () => 'CURRENT_TIMESTAMP' })
+  createdAt: Date
+
+  @Column({ name: 'email_checked', default: 0 })
+  emailChecked: boolean
+
+  @Column({ name: 'passphrase_shown', default: 0 })
+  passphraseShown: boolean
+
+  @Column({ length: 4, default: 'de' })
+  language: string
+
+  @Column({ default: 0 })
+  disabled: boolean
+
+  @Column({ name: 'group_id', default: 0, unsigned: true })
+  groupId: number
+
+  @Column({ name: 'publisher_id', default: 0 })
+  publisherId: number
+}
diff --git a/database/entity/LoginUser.ts b/database/entity/LoginUser.ts
new file mode 100644
index 000000000..034f791cb
--- /dev/null
+++ b/database/entity/LoginUser.ts
@@ -0,0 +1 @@
+export { LoginUser } from './0003-login_server_tables/LoginUser'
diff --git a/database/entity/index.ts b/database/entity/index.ts
index e18757ab8..1881b2932 100644
--- a/database/entity/index.ts
+++ b/database/entity/index.ts
@@ -1,4 +1,5 @@
 import { Balance } from './Balance'
+import { LoginUser } from './LoginUser'
 import { Migration } from './Migration'
 import { Transaction } from './Transaction'
 import { TransactionCreation } from './TransactionCreation'
@@ -9,6 +10,7 @@ import { UserTransaction } from './UserTransaction'
 
 export const entities = [
   Balance,
+  LoginUser,
   Migration,
   Transaction,
   TransactionCreation,
diff --git a/frontend/src/graphql/queries.js b/frontend/src/graphql/queries.js
index 2ee381dd8..01021f601 100644
--- a/frontend/src/graphql/queries.js
+++ b/frontend/src/graphql/queries.js
@@ -75,9 +75,7 @@ export const sendResetPasswordEmail = gql`
 
 export const checkUsername = gql`
   query($username: String!) {
-    checkUsername(username: $username) {
-      state
-    }
+    checkUsername(username: $username)
   }
 `
 
diff --git a/frontend/src/validation-rules.js b/frontend/src/validation-rules.js
index 5552794d1..54f4c3090 100644
--- a/frontend/src/validation-rules.js
+++ b/frontend/src/validation-rules.js
@@ -59,7 +59,7 @@ export const loadAllRules = (i18nCallback) => {
           },
         })
         .then((result) => {
-          return result.data.checkUsername.state === 'success'
+          return result.data.checkUsername
         })
         .catch(() => {
           return false