'guards' => [
    'web' => [
        'driver' => 'session',
        'provider' => 'users',
    ],

    'api' => [
        'driver' => 'token',
        'provider' => 'users',
    ],

    // Nuevo Guard
    'admins' => [
        'driver' => 'token',
        'provider' => 'admins',
    ],
],


'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => AppUser::class,
    ],
    //Nuevo Provider
    'admins' => [
        'driver' => 'eloquent',
        'model' => AppAdmin::class,
    ],
],

<?php

namespace AppHttpControllers;

use IlluminateFoundationAuthAuthenticatesUsers;
use AppHttpControllersController;

class AdminController extends Controller
{

    //trait
    use AuthenticatesUsers;

    //La vista de login
    protected $loginView ="auth.login";

    // El nombre del guard que se creo para administradores
    protected $guard ="admins"


    // Este método funcionará para hacer la redirección después de login
    protected function authenticated()
    {
        return redirect()->route('dashboard');
    }

}

namespace App;

use IlluminateFoundationAuthUser as Authenticatable;

class Admin extends Authenticatable
{
    //
}