Subscribe2 count on page rather than using widget

I wanted the count of subscribers just on one page rather than via a widget on the sidebar. This may be something others would find of interest and worth adding to a future version. I did it by adding the following code to functions.php which created a shortcode called [wbsub2count]. I only wanted the number confirmed but in case someone wanted the number registered or the total I’ve left in the line to get the number registered as well.

function wbsub2countshow()
{
    global $mysubscribe2;
    $registered = $mysubscribe2->get_registered();
    $confirmed = $mysubscribe2->get_public();
    $count = count($confirmed);

    $mystring="We currently have " . $count . " subscribers";
    return $mystring;
}

add_shortcode('wbsub2count','wbsub2countshow');

https://www.ads-software.com/extend/plugins/subscribe2/