You need to change it in your controller, for example the auth controller has a loginPath used in the trait. You can change that variable just by instantiating the variable in your controller.
class AuthController extends Controller {
protected $loginPath = 'myAwesomeUrl';
use AuthenticatesAndRegistersUsers;
public function __construct(Guard $auth, Registrar $registrar)
{
$this->auth = $auth;
$this->registrar = $registrar;
$this->middleware('guest', ['except' => 'getLogout']);
}
}