How to assign or select fields in Laravel Authorization?

Question

MySQL

How does authorization in Laravel understand to use user, login, email columns in the database?
And how can you reassign them? For example on User1 and further use for Auth::

Answer 1

not checked, but I'm starting to guess that the columns are selected in the controller itself.
(well, plus more additions in the models that the password is password1)
MYSQL
login1 | password1

public function authenticateUser(){
$userdata = array(
'login1' => Input::get('login'),
'password1' => Input::get('password')
);
if( Auth::attempt($userdata) ) {
return Redirect::to('/admin');
} else {
return View::make('auth.loginform', array(
'error' => 'user data is incorrect',
'old_input' => Input::all()
));
}
}