Tinypass WP plugin Custom AccessGaranted

<?php
    $rid = "wp_post_" . strval($post->ID);// Same like the tinypass.php of the plugin source
    $store->loadTokensFromCookie($_COOKIE); //not works or how can get the cookie of this post
    $token = $store->getAccessToken($rid); // I'm not shure o.O'
    if($token->isAccessGranted()) { // ok obvusly if the acces is Garanted load the code above
        $show = '<p>Wuuuju!! this is The Private Content </p>'; //just an exaple
        return $show;
    }
    else { //if the acces is NOT Garanted
        echo('Dam!! Not Works'); //an exaple to...
    }

?>