OAuth is not working - ERR_TOO_MANY_REDIRECTS - Is not possible to test oauth login in localhost?

Im using Valet, when accessing "http://proj.test/auth/facebook" we are redirected to "http://proj.test/auth/facebook?code=B...". But it appears an error:

Page is not working, proj.test redirect too many times. ERR_TOO_MANY_REDIRECTS.

Do you know how to fix the error?

Routes:

Auth::routes();

Route::get('/home', 'HomeController@index')->name('home');

Route::get('auth/facebook', 'Auth\RegisterController@redirectToProvider'); 

Route::get('auth/facebook/callback','Auth\RegisterController@handleProviderCallback');

Services.php

'facebook' => [
    'client_id' => '2...',
    'client_secret' => 'a...',
    'redirect' => 'http://proj.test/auth/facebook'
]

RegisterController:

<?php

namespace App\Http\Controllers\Auth;

use App\User;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Validator;
use Illuminate\Foundation\Auth\RegistersUsers;
use Socialite;

class RegisterController extends Controller
{

        use RegistersUsers;

        protected $redirectTo = '/home';

        public function __construct()
        {
             $this->middleware('guest');
        }


    protected function validator(array $data)
    {
        return Validator::make($data, [
                'name' => 'required|string|max:255',
                'email' => 'required|string|email|max:255|unique:users',
                'password' => 'required|string|min:6|confirmed',
        ]);
    }


    protected function create(array $data)
    {
        return User::create([
            'name' => $data['name'],
            'email' => $data['email'],
            'password' => bcrypt($data['password']),
        ]);
    }


    public function redirectToProvider()
    {
        return Socialite::driver('facebook')->redirect();
    }


 public function handleProviderCallback()
    {
        $user = Socialite::driver('facebook')->user();

        return $user->getEmail();

        // $user->token;
    }
}