Update main.py

main.py

@@ -100,7 +100,7 @@ async def get_chat_raw(username: str = None):
             "is_personal": chat_.photo.is_personal
         },
         "from_user": {
-            "id": chat_.pinned_message.from_user.id,
+            "id": chat_.pinned_message.from_user.id if chat_.pinned_message.from_user else None,
             "first_name": chat_.pinned_message.from_user.first_name,
             "last_name": chat_.pinned_message.from_user.last_name,
             "status": chat_.pinned_message.from_user.status.name,