Appreciate the correction, got to it in time! And as others have noted, this is probably the most enterprise-grade/production-hardened solution out there in th

Appreciate the correction, got to it in time! And as others have noted, this is probably the most enterprise-grade/production-hardened solution out there in the list that I made that represents my current list in the F/OSS space. If I were to think hard about it, there are probably lots of much older options (depends on where you put the scope of AuthN to be, is LDAP a competitor?), but Keycloak is probably the one you're going to find the most resources and scrutiny around. A large financial institution I worked with two years ago was using Keycloak. I was annoyed with some UI bits and terminology that was very confusing but it was overall a great choice back then IMO, has probably mostly/only gotten better since.