Not a library, but you can use Lucia auth (https://lucia-auth.com/) as a guide to make an auth system yourself

I wrote my own. I know you're not supposed to do it, but I copied the django implementation as best I could so its probably OK. It's not much work actually.

Exactly, I am looking for a suitable authentication library in go since long time, but I cannot finding anything. Things like authboss are not really usable at all.

Depends on your needs but Zitadel can do that for you.

We also have a good oidc library that helps you plug into systems that support open id connect.

Check authboss, casbin and casdoor.