【cakephp3】steamアカウントでログイン認証

    "repositories":[
        {
            "type": "vcs",
            "url": "https://github.com/iignatov/LightOpenID"
        }
    ],
    "require": {
        "php": ">=5.6",
        "iignatov/lightopenid": "*"
    },

composer update

    public function index()
    {
        $this->autoRender = FALSE;
        $openid = new LightOpenID("https://". $_SERVER["HTTP_HOST"]. "/auth/steam");
        $openid->identity = "http://steamcommunity.com/openid";
        $openid->returnUrl = "https://". $_SERVER["HTTP_HOST"]. "/auth/steam/callback";

        if($openid->mode === null) return $this->redirect($openid->authUrl());
    }

$this->autoRender = FALSE;

$openid = new LightOpenID("https://". $_SERVER["HTTP_HOST"]. "/auth/steam");

        $openid->identity = "http://steamcommunity.com/openid";

$openid->returnUrl = "https://". $_SERVER["HTTP_HOST"]. "/auth/steam/callback";

if($openid->mode === null) return $this->redirect($openid->authUrl());

    public function callback()
    {
        $this->autoRender = FALSE;
        $openid = new LightOpenID("https://". $_SERVER["HTTP_HOST"]. "/auth/steam");
        $openid->identity = "http://steamcommunity.com/openid";
        $openid->returnUrl = "https://". $_SERVER["HTTP_HOST"]. "/auth/steam/callback";

        $steam_id = str_replace('https://steamcommunity.com/openid/id/', '', $this->request->getQuery('openid_identity'));
        $user = $this->TUsers->find()->where(['steam_id' => $steam_id]);

        if(empty($this->Auth->user()) && $user->isEmpty()) return $this->registry($steam_id);
        if(!empty($this->Auth->user()) && $user->isEmpty()) return $this->cooperation($steam_id);
        if(empty($this->Auth->user()) && !$user->isEmpty()) return $this->login($user);
        if(!empty($this->Auth->user()) && !$user->isEmpty()) return $this->release();

        $this->render('/Auth/complete');
    }

        if(empty($this->Auth->user()) && $user->isEmpty()) return $this->registry($steam_id);

    protected function registry($steam_id)
    {
        $steam_user_json = file_get_contents("http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key=[steam_web_api_key]&steamids={$steam_id}");
        $steam_user = json_decode($steam_user_json);
        $steam_user = $steam_user->response->players[0];

        $users_entity = $this->TUsers->newEntity([
            "user_id" => uniqid(),
            "name" => $steam_user->personaname,
            "image" => $steam_user->avatar,
            "steam_id" => $steam_id,
        ]);
        if($this->TUsers->save($users_entity)) {
            $this->Auth->setUser($users_entity);
            return $this->redirect("/{$users_entity->user_id}");
        } else {
            echo '失敗';
        }
    }

        $steam_user_json = file_get_contents("http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?key=[steam_web_api_key]&steamids={$steam_id}");