API-23: Refactoring for better architecture (#12)

Endpoints are separated into distinct packages and interfaces are extracted into files

Co-authored-by: Patrick Müller <patrick@mueller-patrick.tech>
Reviewed-on: #12
Co-authored-by: Patrick Müller <patrick@plutodev.de>
Co-committed-by: Patrick Müller <patrick@plutodev.de>

src/models/partyplaner/login/Login.router.ts

@@ -2,7 +2,7 @@
  * Required External Modules and Interfaces
  */
 import express, {Request, Response} from 'express';
-import * as UserService from '../userService/user.service';
+import * as UserService from '../user/user.service';
 import logger from '../../../middleware/logger';
 
 /**