pick another layout for login page in CakeDC/Users

AppController.php

    public function beforeRender(Event $e)
    {
        if ($this->request->param('action') === 'login' &&
            $this->request->param('controller') === 'Users' &&
            $this->request->param('plugin') === 'CakeDC/Users'
        ) {
            $this->viewBuilder()->layout('login');
        }
    }