mtv\wp\models\User::activate PHP Method

    public static function activate($key)
    {
        $result = activate_signup($key);
        if (is_wp_error($result)) {
            throw new WPException($result);
        }
        $collection = static::$collection;
        $user = $collection::get(array('id' => $result['user_id']));
        return $user;
    }