Having Problems with Websocket URI

[Samshaw0]

I'm having problems working out what to put into the websocket_uri in the config file (I'm completely new to websockets). I tried putting in:
ws://sim.smogon.com:8000/showdown/websocket
wss://sim3.psim.us/showdown/websocket
but both throw up errors when it tries to login. I've also tried adding in random text, and it threw up the same error which makes me believe that the websocket_uri is what's leading to the error. I got the websockets uri [from here] (https://github.com/smogon/pokemon-showdown/blob/master/PROTOCOL.md). If there's something I'm doing wrong please let me know, as I was very interested in writing my own best_move_function.