Fix Tim Coding

00-backend/src/main/java/de/htwsaar/webshop/controller/AccountController.java

@@ -49,6 +49,7 @@ public class AccountController {
             log.warn("[{}] Account cant be created, Email is already in use", request.getRequestURI());
             return ResponseEntity.unprocessableEntity().build();
         }
+        account.setId(null);
         if (accountService.saveNew(account).getId() == null) {
             return ResponseEntity.internalServerError().build();
         }