Use default user auth group from site settings

bookwyrm/models/user.py

@@ -3,9 +3,9 @@ import re
 from urllib.parse import urlparse
 
 from django.apps import apps
-from django.contrib.auth.models import AbstractUser, Group
+from django.contrib.auth.models import AbstractUser
 from django.contrib.postgres.fields import ArrayField, CICharField
-from django.core.exceptions import PermissionDenied
+from django.core.exceptions import PermissionDenied, ObjectDoesNotExist
 from django.dispatch import receiver
 from django.db import models, transaction
 from django.utils import timezone
@@ -356,8 +356,14 @@ class User(OrderedCollectionPageMixin, AbstractUser):
 
             # make users editors by default
             try:
-                self.groups.add(Group.objects.get(name="editor"))
-            except Group.DoesNotExist:
+                group = (
+                    apps.get_model("bookwyrm.SiteSettings")
+                    .objects.get()
+                    .default_user_auth_group
+                )
+                if group:
+                    self.groups.add(group)
+            except ObjectDoesNotExist:
                 # this should only happen in tests
                 pass