MQTT user authentication not supported
The MQTT client doesn't support user authentication. It's mentioned in the camera configuration that if your MQTT Broker requires user/pass authentication, you can set it up on the camera, which I did and verified the camera can connect. But the homebridge plugin doesn't currently support authentication.

I edited client.js to pass the info through to the client URL, but did so in a crude way that probably wouldn't stand up to the rigors of general consumption. It'd be awesome to get in properly supported!