如何使用python websockets安全连接Bitstamp Websocket v2.0 API？证书验证错误

import ssl
import websockets

ssl_context = ssl.create_default_context()
ssl_context.check_hostname = False
ssl_context.verify_mode = ssl.CERT_NONE

url = "wss://ws.bitstamp.net"

async def connect_bitstamp():
    async with websockets.connect(url, ssl=ssl_context) as websocket:
        # 在此处编写与Bitstamp Websocket API的交互逻辑
        pass

await websocket.send('{"event": "bts:subscribe", "data": {"channel": "live_trades_btcusd"}}')

response = await websocket.recv()
print(response)

if __name__ == "__main__":
    asyncio.get_event_loop().run_until_complete(connect_bitstamp())