Socket error: 407: Proxy Authentication Required

code:
```
mqtt_client = mqtt.Client(CallbackAPIVersion.VERSION2, protocol=MQTTProtocolVersion.MQTTv5, transport='websockets')
mqtt_client.proxy_set(proxy_type=socks.HTTP, proxy_addr='116.97.15.46', proxy_port=21433, proxy_username='61mdQQwpOX', proxy_password='vZxDiS')
mqtt_client.connect("wss.***.***", 443)
```
error:
```
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\paho\mqtt\client.py", line 1435, in connect
return self.reconnect()
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\paho\mqtt\client.py", line 1598, in reconnect
self._sock = self._create_socket()
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\paho\mqtt\client.py", line 4609, in _create_socket
sock = self._create_socket_connection()
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\paho\mqtt\client.py", line 4638, in _create_socket_connection
return socks.create_connection(addr, timeout=self._connect_timeout, source_address=source, **proxy)
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\socks.py", line 209, in create_connection
raise err
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\socks.py", line 199, in create_connection
sock.connect((remote_host, remote_port))
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\socks.py", line 47, in wrapper
return function(*args, **kwargs)
File "c:\Users\Four\AppData\Local\Programs\Python\Python310\lib\site-packages\socks.py", line 814, in connect
raise GeneralProxyError("Socket error", error)
socks.GeneralProxyError: Socket error: 407: Proxy Authentication Required
```
proxy is still alive and uses the requests as usual