This is the administrative side ("backend") of your application.
Everything related to it is contained inside
You can treat this directory as a
/protected subdirectory equivalent.
Backend includes YiiBooster as a widget toolkit, which is composed of both Twitter Bootstrap and jQuery UI toolkits.
Points of interest:
/backend/components/BackendController.php is the base for all backend controllers.
It registers all required styles and scripts for common backend UI.
Password-based login is already implemented for the backend.
You can look at its mechanics starting at
Login/password can be seen in plaintext inside the second migration in
which creates users in DB.