fix: fixing timezone.now() changes.

Author: awais786

credentials/apps/api/v2/tests/test_serializers.py

@@ -5,7 +5,7 @@
 import ddt
 from django.test import TestCase
 from django.urls import reverse
-from django.utils.timezone import datetime, timezone
+from django.utils import timezone
 from rest_framework.exceptions import ValidationError
 from rest_framework.settings import api_settings
 from rest_framework.test import APIRequestFactory