Can't listen to FTX filled orders in-stream by using FtxWebsocketClient

Question

guys

I want to listen to someone's FTX future orders in-stream and I try this

from client import FtxWebsocketClient
import time
wsm_client = FtxWebsocketClient()
while True:
    if wsm_client.get_fills() != []:
        print(wsm_client.get_fills())
    if wsm_client.get_orders() != {}:
        print(wsm_client.get_orders())
    time.sleep(0.25)

But it always returns an empty string but there are orders get filled.

Any ideas?

Thank you