add callback url

backend/account/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 from .models import *
-from unfold.admin import ModelAdmin, TabularInline
+from unfold.admin import  TabularInline
 from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
 from import_export.admin import ImportExportModelAdmin
 from unfold.contrib.import_export.forms import ExportForm, ImportForm, SelectableFieldsExportForm