private $app;

public function __construct()
{
    parent::__construct();
    
    $config = [
        'qq' => [
            'app_id' => '',
            'app_key' => '',
            'callback' => 'http://www.olcms.com/Home/Index/qqCallback'
        ]
    ];
    $this->app = new \olcms\Foundation\Application($config);
}

public function index()
{
    $this->app->qq->login();
}

public function qqCallback()
{
    $user = $this->app->qq->getUserinfo(I(''));
    dump($user);
}