Update main.py

main.py

@@ -104,7 +104,7 @@ async def get_chat_raw(username: str = None):
             "first_name": ok.pinned_message.from_user.first_name if ok.pinned_message.from_user else None,
             "last_name": ok.pinned_message.from_user.last_name if ok.pinned_message.from_user else None,
             "status": ok.pinned_message.from_user.status.name if ok.pinned_message.from_user else None,
-            "last_online_date": chat_.pinned_message.from_user.last_online_date if ok.pinned_message.from_user else None,
+            "last_online_date": ok.pinned_message.from_user.last_online_date if ok.pinned_message.from_user else None,
             "username": ok.pinned_message.from_user.username if ok.pinned_message.from_user else None,
             "is_premium": ok.pinned_message.from_user.is_premium if ok.pinned_message.from_user else None,
             "is_scam": ok.pinned_message.from_user.is_scam if ok.pinned_message.from_user else None