diff --git a/apps/course/data/category.json b/apps/course/data/category.json
new file mode 100644
index 0000000..092e449
--- /dev/null
+++ b/apps/course/data/category.json
@@ -0,0 +1,42 @@
+[
+    {
+        "id": 8,
+        "name": "Комплексный годовой курс",
+        "slug": "kompleksnyi-godovoi-kurs"
+    },
+    {
+        "id": 7,
+        "name": "Исламская философия",
+        "slug": "islamskaia-filosofiia"
+    },
+    {
+        "id": 6,
+        "name": "Арабский диалог",
+        "slug": "arabskii-dialog"
+    },
+    {
+        "id": 5,
+        "name": "грамматике арабского языка",
+        "slug": "grammatike-arabskogo-iazyka"
+    },
+    {
+        "id": 4,
+        "name": "Персидский язык",
+        "slug": "persidskii-iazyk"
+    },
+    {
+        "id": 3,
+        "name": "исламской философии",
+        "slug": "islamskoi-filosofii"
+    },
+    {
+        "id": 2,
+        "name": "Толкование корана",
+        "slug": "tolkovanie-korana"
+    },
+    {
+        "id": 1,
+        "name": "Таджвид Корана",
+        "slug": "tadzhvid-korana"
+    }
+]
\ No newline at end of file
diff --git a/apps/quiz/serializers/quiz.py b/apps/quiz/serializers/quiz.py
index 08c6c55..dd7c549 100644
--- a/apps/quiz/serializers/quiz.py
+++ b/apps/quiz/serializers/quiz.py
@@ -51,8 +51,11 @@ class QuizSerializer(serializers.ModelSerializer):
         fields = ['id', 'permission', 'lesson', 'title', 'description', 'each_question_timing', 'questions']
 
     def get_permission(self, obj):
+        request = self.context.get('request')
+        if not request or not request.user.is_authenticated:
+            return False 
         # Check if the user has participated in this quiz
-        user = self.context['request'].user
+        user = request.user
         participated = QuizParticipant.objects.filter(user=user, quiz=obj).exists()
         return not participated