core: make is_superuser a group property, remove from user

passbook/core/migrations/0003_default_user.py

@@ -1,7 +1,7 @@
 # Generated by Django 3.0.6 on 2020-05-23 16:40
 
 from django.apps.registry import Apps
-from django.db import migrations
+from django.db import migrations, models
 from django.db.backends.base.schema import BaseDatabaseSchemaEditor
 
 
@@ -15,8 +15,6 @@ def create_default_user(apps: Apps, schema_editor: BaseDatabaseSchemaEditor):
         username="pbadmin", email="root@localhost", name="passbook Default Admin"
     )
     pbadmin.set_password("pbadmin")  # noqa # nosec
-    pbadmin.is_superuser = True
-    pbadmin.is_staff = True
     pbadmin.save()
 
 
@@ -27,5 +25,15 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.RemoveField(model_name="user", name="is_superuser",),
+        migrations.RemoveField(model_name="user", name="is_staff",),
         migrations.RunPython(create_default_user),
+        migrations.AddField(
+            model_name="user",
+            name="is_superuser",
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name="user", name="is_staff", field=models.BooleanField(default=False)
+        ),
     ]