I think it's great that you've developed an app with Svelte and you're using OAuth 2.0 login with Firebase. It's awesome that you actually published something!
Things I don't like: The design, the lack of information on how to use it, it seems to be broken in Firefox - or maybe I just don't know how to use it.
Things I don't like: The design, the lack of information on how to use it, it seems to be broken in Firefox - or maybe I just don't know how to use it.