Hi, ah good question. I haven't really thought about how to map user accounts to clubs yet, but that's a problem that's a bit separate from the SSO stuff. I think the ideal solution is that someone signs up (with or without SSO), and the owner of a club (or an admin) can invite that user to join the club. But that's not yet implemented.

I do want to make it a requirement that the SSO implementation should allow you to map groups of the SSO provider to groups inside Bracket (which at the moment would be only the admins "group"). So that way, users who are admins in the SSO provider are also admins in Bracket.