Laravel

Implicit Route Binding

From this video

 Route::get('users/{user}', function(App\User $user){
   return $user;
 });

If the arg name matches the token, it will magic that value into place. With the type hinting, it will find a user with the primary key given in the url.

To use something other than the primary key, you have to add a route binding in RouteServiceProvider.