fix maintance

akn/manage/callback.py

@@ -1292,7 +1292,7 @@ It only takes a few minutes to activate your own unique bot with 0 coding:
 @ren.on_callback_query(filters.regex("^tutorial_alldlbot$"))
 async def tutor_alldlbot(client, cb: CallbackQuery):
     user_id = cb.from_user.id
-    if await db.client.get_maintance(client.me.id):
+    if await db_client.get_maintance(client.me.id):
         return await query.answer("Bot is under maintenance, please try again later.", True)
 
     if not await db_client.get_privacy_policy(user_id):