Is it possible to add a custom channel to the liveview socket?

I know this is dated but did you figure this out?

I was looking at the Phoenix.LiveView.Socket docs and it said the following.

To share an underlying transport connection between regular Phoenix channels and LiveView processes, use Phoenix.LiveView.Socket from your own MyAppWeb.UserSocket module.

Next, declare your channel definitions and optional connect/3, and id/1 callbacks to handle your channel specific needs, then mount your own socket in your endpoint:

socket "/live", MyAppWeb.UserSocket,
  websocket: [connect_info: [session: @session_options]]

I also have a custom user socket where I want to do custom channels and message routing.

How did this go?