Replace usage of django.utils.timezone module (which was deprecated i…

…n django 4.1 and removed in django>=5.0) with the python datetime module

    see django documentation here https://docs.djangoproject.com/en/dev/internals/deprecation/#deprecation-removed-in-5-0

dj_rest_auth/jwt_auth.py

@@ -1,4 +1,4 @@
-from django.utils import timezone
+from datetime import timezone
 from django.utils.translation import gettext_lazy as _
 from rest_framework import status
 from rest_framework import exceptions, serializers

dj_rest_auth/views.py

@@ -3,7 +3,7 @@
 from django.contrib.auth import login as django_login
 from django.contrib.auth import logout as django_logout
 from django.core.exceptions import ObjectDoesNotExist
-from django.utils import timezone
+from datetime import datetime
 from django.utils.decorators import method_decorator
 from django.utils.translation import gettext_lazy as _
 from django.views.decorators.debug import sensitive_post_parameters
@@ -81,8 +81,8 @@ def get_response(self):
             from rest_framework_simplejwt.settings import (
                 api_settings as jwt_settings,
             )
-            access_token_expiration = (timezone.now() + jwt_settings.ACCESS_TOKEN_LIFETIME)
-            refresh_token_expiration = (timezone.now() + jwt_settings.REFRESH_TOKEN_LIFETIME)
+            access_token_expiration = (datetime.utcnow() + jwt_settings.ACCESS_TOKEN_LIFETIME)
+            refresh_token_expiration = (datetime.utcnow() + jwt_settings.REFRESH_TOKEN_LIFETIME)
             return_expiration_times = api_settings.JWT_AUTH_RETURN_EXPIRATION
             auth_httponly = api_settings.JWT_AUTH_HTTPONLY