Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

accounts/management/commands/reset_social_auth.py

@@ -1,17 +1,24 @@
 from django.core.management.base import BaseCommand
 from django.db import connection
 
+
 class Command(BaseCommand):
-    help = 'Reset social auth configuration'
+    help = "Reset social auth configuration"
 
     def handle(self, *args, **options):
         with connection.cursor() as cursor:
             # Delete all social apps
             cursor.execute("DELETE FROM socialaccount_socialapp")
             cursor.execute("DELETE FROM socialaccount_socialapp_sites")
-            
+
             # Reset sequences
-            cursor.execute("DELETE FROM sqlite_sequence WHERE name='socialaccount_socialapp'")
-            cursor.execute("DELETE FROM sqlite_sequence WHERE name='socialaccount_socialapp_sites'")
-            
-            self.stdout.write(self.style.SUCCESS('Successfully reset social auth configuration'))
+            cursor.execute(
+                "DELETE FROM sqlite_sequence WHERE name='socialaccount_socialapp'"
+            )
+            cursor.execute(
+                "DELETE FROM sqlite_sequence WHERE name='socialaccount_socialapp_sites'"
+            )
+
+            self.stdout.write(
+                self.style.SUCCESS("Successfully reset social auth configuration")
+            )