Hey Fediverse - if I wanted to set up a generalised authentication backend for current and future projects, where users could self register, change passwords, update details etc, and I could have that available via a bunch of methods like oauth, LDAP, whatever ... How much is possible with off the shelf software right now? What's out there that's good?

I've searched of course, but anyone out there got personal experience in this area and feel like a chat? #sysadmin