Laravel Duskのブラウザ統合テストでlaravel-adminの認証を通す

<?php namespace Tests\Browser; use App\Models\Administrator; use Laravel\Dusk\Browser; use Tests\DuskTestCase; use Illuminate\Database\Eloquent\Factories\Factory; class ExampleTest extends DuskTestCase { /** * A basic browser test example. * * @return void */ public function testBasicExample() { $class = config('admin.auth.providers.admin.model'); $admin = Factory::factoryForModel($class)->create(