Class "core\Auth" not found

/www/wwwroot/stime/drama/app/services/user/UserDramaActionService.php:16

#0 /www/wwwroot/stime/drama/app/services/drama/DramaService.php(123): app\services\user\UserDramaActionService->getUserAction()
#1 /www/wwwroot/stime/drama/app/controllers/web/DramaController.php(50): app\services\drama\DramaService->detail()
#2 /www/wwwroot/stime/drama/core/Router.php(93): app\controllers\web\DramaController->detail()
#3 /www/wwwroot/stime/drama/core/Router.php(18): core\Router->dispatch()
#4 /www/wwwroot/stime/drama/public/index.php(18): core\Router->route()
#5 {main}