alt Hacker NewsHister supports token based, password based, and OIDC/OAuth authentications with optional multi-user handling. Details about user handling can be found here: https://hister.org/docs/user-handling
It also has a "public mode" where anyone can search the indexed content, but only authenticated users can add or modify it.
It seemed like the public mode was the default when I set it up. If so, that’s a fairly dangerous default as keeping a “clean” history with no secrets leaked seems neigh impossible.