Update app.py

app.py

@@ -37,8 +37,8 @@ async def downdb():
     client = TelegramClient(None, api_id, api_hash)
     await client.start(bot_token=bot_token)
     os.remove('instance/database.db')
-    async for message in client.iter_messages(channel, limit=1):
-        await fast_download(client,message)
+    last_message = (await client.get_messages(chat, 1))[0]
+    await fast_download(client,last_message)
     
     return '2'