Framy provides an basic User Authentication out of the box. With everything you might need. Since all applications are different from each other you can change all of it to your needs.
The CreateUseresTaple.php file located at database/migrations contains as the name says the migration class for the users table in the database. So all you have to do is run the php Framy migrate command. You are free to edit it to your needs.
The AuthController manages all the Auth stuff. everything you see in there right away is well documented and you are free to edit it to your needs.
You can simply access the Auth Class, with all its functionality via the $auth value from inside the templates.