Gitamin\Http\Controllers\Auth\AuthController::callback PHP Méthode

    public function callback($slug)
    {
        if (Input::has('code')) {
            $provider = Provider::where('slug', '=', $slug)->firstOrFail();
            try {
                $extern_user = Socialite::with($slug)->user();
            } catch (InvalidStateException $e) {
                return Redirect::to('/auth/login')->withErrors(['授权失效']);
            }
            //检查是否已经连接过
            $identity = Identity::where('provider_id', '=', $provider->id)->where('extern_uid', '=', $extern_user->id)->first();
            if (is_null($identity)) {
                Session::put('connect_data', ['provider_id' => $provider->id, 'extern_uid' => $extern_user->id, 'nickname' => $extern_user->nickname]);
                return Redirect::to('/auth/landing');
            }
            //已经连接过，找出user_id, 直接登录
            $user = User::find($identity->user_id);
            if (!Auth::check()) {
                Auth::login($user, true);
                //event(new UserWasLoggedinEvent($user));
            }
            return Redirect::to('/')->withSuccess(sprintf('%s %s', trans('gitamin.awesome'), trans('gitamin.login.success_oauth', ['provider' => $provider->name])));
        }
    }