Adding users to 'Private' Plugin

How do I add users with username and password?
The plugin works properly with the default password, but the documentation is very confusing as to how the users list should be built.
Thanks in advance.

I've never used it, but from what I read on https://github.com/Diyzzuf/grav-plugin-private there's no user management, but the site is password-protected with a shared password.

If you want to manage users logins you are looking for the Login plugin: https://github.com/getgrav/grav-plugin-login/blob/master/README.md

Thanks flavicopes, I really seem to be confused with the documentation :) All good now.