Fix missing import bug in UserAdmin, StateAdmin, add tests for those cases

allianceauth/groupmanagement/tests/__init__.py

@@ -0,0 +1,11 @@
+from django.urls import reverse
+
+
+def get_admin_change_view_url(obj: object) -> str:
+    return reverse(
+        'admin:{}_{}_change'.format(
+            obj._meta.app_label,
+            type(obj).__name__.lower()
+        ),
+        args=(obj.pk,)
+    )