static function getSimpleSessionData($return_to = "/") {

        $data = [];
        $current_user = UserService::getCurrentUser();
        $data["logout_url"] = self::createLogoutURL();
        $data["login_url"] = self::createLoginURL($return_to);
        $data["google_login_url"] = self::getAuthRedirectUrl();
        $data["logged_in"] = (bool)$current_user;
        $data["user_is_admin"] = self::isCurrentUserAdmin();
        $data["user_email"] = self::getCurrentUserEmail();
        $data["user_google_id"] = $current_user->getUserId();
        $data["user_name"] = $current_user->getNickname();
        $data["is_devserver"] = Util::isDevServer();
        $data["have_google_token"] = false;
        $data["picture"] = Util::getGravatar($data["user_email"]);
        if ($current_user) {
            $google_client = self::getGoogleClientForCurrentUser();
            $token = $google_client->getAccessToken();
            if ($token) {
                $data["have_google_token"] = true;
            }
        }
        return $data;

    }