public function sso()
    {
        // GET variables from FoxyCart Request
        $fcsid = $this->request->getVar('fcsid');
        $timestampNew = strtotime('+30 days');

        // get current member if logged in. If not, create a 'fake' user with Customer_ID = 0
        // fake user will redirect to FC checkout, ask customer to log in
        // to do: consider a login/registration form here if not logged in
        if (!$Member = Security::getCurrentUser()) {
            $Member = new Member();
            $Member->Customer_ID = 0;
        }

        $auth_token = sha1($Member->Customer_ID . '|' . $timestampNew . '|' . FoxyCart::getStoreKey());

        $config = FoxyStripeSetting::current_foxystripe_setting();
        if ($config->CustomSSL) {
            $link = FoxyCart::getFoxyCartStoreName();
        } else {
            $link = FoxyCart::getFoxyCartStoreName() . '.foxycart.com';
        }

        $params = [
            'fc_auth_token' => $auth_token,
            'fcsid' => $fcsid,
            'fc_customer_id' => $Member->Customer_ID,
            'timestamp' => $timestampNew,
        ];

        $httpQuery = http_build_query($params);

        $this->redirect("https://{$link}/checkout?$httpQuery");
    }