"Introduction: The first two recipes show us how to set up a
basic, yet fully working authentication system. The next three
recipes allow our users to log in using different information, have
their user details saved after a successful login, and show us how
to get this user information.
"Setting up a basic authentication system: The first task to be
completed when we are in the process of adding authentication to an
application is to identify which controllers will need user access.
Normally we would make every controller and action protected by
default, and then we would specify which areas of our application
allow public access."