Customize Login routes in Laravel 5.3

Hello, I have a problem with the Login routing with the php artisan make:auth method that generates everything you need. Since we are going it cost me a lot to join the project that I was doing to this login and its views. But it won't let me change the default route to one I want

This is how they come by default:

Route::get('login', 'Auth\LoginController@showLoginForm')->name('login');

Route::post('login', 'Auth\LoginController@login');

Route::post('logout', 'Auth\LoginController@logout');

This is how I customize

Route::get('admin/auth/login', 'Auth\LoginController@showLoginForm')->name('login');

Route::post('admin/auth/login', 'Auth\LoginController@login');

Route::post('admin/auth/logout', 'Auth\LoginController@logout');

LoginController.php

use AuthenticatesUsers;


protected $redirectTo = '/';


public function __construct()
{
    $this->middleware('guest', ['except' => 'logout']);
}

public function showLoginForm()
{
    return view('admin.auth.login'); //tambien cambie de dir la carp auth
}

public function logout(Request $request)
{
    $this->guard()->logout();

    $request->session()->flush();

    $request->session()->regenerate();

    //return view('inicio');
    return redirect('/');
}

When I enter the login route, and I log in, it throws me this error:

NotFoundHttpException in RouteCollection.php line 161:...