feat: address QA feedback and limit Checko collection

tests/apps/user/test_views.py

@@ -595,6 +595,17 @@ class TokenRefreshViewTest(APITestCase):
         # New refresh token should be different
         # Refresh token may be the same or different depending on implementation
 
+    def test_same_refresh_token_can_handle_parallel_refresh_requests(self):
+        data = {"refresh": self.tokens["refresh"]}
+
+        first_response = self.client.post(self.refresh_url, data, format="json")
+        second_response = self.client.post(self.refresh_url, data, format="json")
+
+        self.assertEqual(first_response.status_code, status.HTTP_200_OK)
+        self.assertEqual(second_response.status_code, status.HTTP_200_OK)
+        self.assertEqual(first_response.data["refresh"], self.tokens["refresh"])
+        self.assertEqual(second_response.data["refresh"], self.tokens["refresh"])
+
     def test_refresh_token_invalid(self):
         """Test token refresh fails with invalid refresh token"""
         data = {"refresh": fake.pystr(min_chars=20, max_chars=50)}