Method updateNewsletterInfoByUser

public static function updateNewsletterInfoByUser($userId, $newsletter = 0)
{
    $db = Factory::getDBO();
    $query = ' UPDATE #__phocacart_users' . ' SET newsletter = ' . (int) $newsletter . ' WHERE user_id = ' . (int) $userId;
    $db->setQuery($query);
    $db->execute();
    return true;
}