Gitamin\Services\TwigBridge\Extensions\Avatar::getUserAvatar PHP Method

    protected function getUserAvatar($email, $size)
    {
        $url = '//gravatar.com/avatar/';
        $query = ["s={$size}"];
        $id = md5(strtolower($email));
        return $url . $id . '?' . implode('&', $query);
    }