Channels are just names. In the Docs you will see that example:
channel "room:*", HelloWeb.RoomChannel
Then there is a join function:
defmodule HelloWeb.RoomChannel do
use Phoenix.Channel
def join("room:lobby", _message, socket) do
{:ok, socket}
end
def join("room:" <> _private_room_id, _params, _socket) do
{:error, %{reason: "unauthorized"}}
end
end
(in this example the private rooms are always refused since the docs talks about implementing the authorization later on).
As long as your join function accepts _private_room_id as a room name (i.e. it returns ok), then your channel exists, basically.
