I definitely want to add AUTH to coracle, just haven't been able to get to it. It's my opinion that private relays are the future of nostr, so AUTH support will eventually be a sine qua non.
Discussion
We desperately want to support it for filter.nostr.wine but we really want it in a header. Seems like such a waste to open the websocket connection when we ONLY want authenticated users to connect.
Interesting, that would be a good addition, but I could see use cases where clients would want to re-AUTH against clients many times in a single session