diff --git a/apps/course/serializers/lesson.py b/apps/course/serializers/lesson.py
index 0c39c63..e828e51 100644
--- a/apps/course/serializers/lesson.py
+++ b/apps/course/serializers/lesson.py
@@ -47,6 +47,11 @@ class CourseLessonSerializer(serializers.ModelSerializer):
         """Deprecated: use _has_access instead."""
         return self._has_access(student, course)
 
+    def _get_authenticated_user(self):
+        """Helper method to retrieve the authenticated user from the context."""
+        request = self.context.get('request')
+        return request.user if request and request.user.is_authenticated else None
+
     def get_is_complated(self, obj):
         request = self.context.get('request')
         if not request or not request.user.is_authenticated: