Two Phoenix app on a single websocket

I have created this learning app that uses only channels instead of controllers and works very nice.
However now I want to connect another application to it, using the same websocket, and practically to use the same channels. Tried different approaches without any success.
The Heroku app ws is wss://

Now I’m going to try also with, but I really hoped that this can be done in Elixir without other libraries.

Any ideas/starting point?


I have added more info about my latest attempts on this stackoverflow question: