refactor!: Move to custom user model

src/fellchensammlung/models.py

@@ -2,12 +2,14 @@ import uuid
 
 from django.db import models
 from django.urls import reverse
-from django.contrib.auth.models import User
 from django.utils.translation import gettext_lazy as _
 from datetime import datetime
 from django.dispatch import receiver
 from django.db.models.signals import post_save
 from django.contrib.auth.models import Group
+from django.contrib.auth.models import AbstractUser
+
+
 
 from fellchensammlung.tools import misc
 
@@ -285,6 +287,10 @@ Membership
 """
 
 
+class User(AbstractUser):
+    pass
+
+
 class Member(models.Model):
     """
     Model that holds a user's profile, including the django user model