app.php

'providers' => array(
  'Illuminate\Foundation\Providers\ArtisanServiceProvider',
  /*'Illuminate\Auth\AuthServiceProvider',*/ //comentamos esta linea
  'Illuminate\Cache\CacheServiceProvider',
  'Illuminate\Session\CommandsServiceProvider',
  'Illuminate\Foundation\Providers\ConsoleSupportServiceProvider',
  'Illuminate\Routing\ControllerServiceProvider',
  'Illuminate\Cookie\CookieServiceProvider',
  'Illuminate\Database\DatabaseServiceProvider',
  'Illuminate\Encryption\EncryptionServiceProvider',
  'Illuminate\Filesystem\FilesystemServiceProvider',
  'Illuminate\Hashing\HashServiceProvider',
  'Illuminate\Html\HtmlServiceProvider',
  'Illuminate\Log\LogServiceProvider',
  'Illuminate\Mail\MailServiceProvider',
  'Illuminate\Database\MigrationServiceProvider',
  'Illuminate\Pagination\PaginationServiceProvider',
  'Illuminate\Queue\QueueServiceProvider',
  'Illuminate\Redis\RedisServiceProvider',
  'Illuminate\Remote\RemoteServiceProvider',
  'Illuminate\Auth\Reminders\ReminderServiceProvider',
  'Illuminate\Database\SeedServiceProvider',
  'Illuminate\Session\SessionServiceProvider',
  'Illuminate\Translation\TranslationServiceProvider',
  'Illuminate\Validation\ValidationServiceProvider',
  'Illuminate\View\ViewServiceProvider',
  'Illuminate\Workbench\WorkbenchServiceProvider',
  'Ollieread\Multiauth\MultiauthServiceProvider', // y agregamos el serviceProvider del Multi Auth
),