laravel authentication :exact location of AuthController

I am new to the laravel framework,and i setup the laravel basic authentication it simple and awesome.

I need a clarification in following things

1.when i list the all routes using route list command i can see the many routes including the functionalities for login and register ,but the routes not registerd in in route.php file ,how its worked?

2.I want to add some more fields in registration for that i am looking for this function AuthController@register ,but there is no function named register in it,so where it is actually located.??

via Chebli Mohamed