Not built by default, but can be added with `go build -tags nullauth`. Enabled by running tokidoki with `-auth.url null://`. Very useful for simpler debugging when you don't want manage test accounts with actual passwords.
Handy for small local installations. Disabled by default because it adds a dependency on the PAM library.
New providers need to "register" their URL scheme of choice in auth.NewFromURL(). Implements: https://todo.sr.ht/~sircmpwn/tokidoki/1