Help desperately needed with js code

Scriptcase 9 General
#1

Please can someone help me here. I just can’t get this code to work.
I have an app that naturally calls a series of other apps making up my entire web-application.
Part of the service offered is PUSH notifications which I have chosen PushAlert.co .
As the user opens the app they need to be asked if they wish to receive PUSH Notifications.
At whish point I need to catch the subscriber id, as these are the folks we want to send PUSH to.

If a user has said No and they wish to subscribe after, I need to again capture their subscription id.

Below is the code I have but for whatever reason I am unable to get the subscriber ID from the console.

Please can someone help me (and yes I have asked them but their replies are meaningless)…
Here is a link to their online documentation. [JS API - PushAlert](https://PushAlert Documentation)

?>
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body >
<p id="browserPush"></p>
 <script type="text/javascript">
        (function(d, t) {
            var g = d.createElement(t),
            s = d.getElementsByTagName(t)[0];
            g.src = "https://cdn.pushalert.co/integrate_c0108a215df8f0f09b1b72a6bfa87417.js";
            s.parentNode.insertBefore(g, s);
            }(document, "script"));

    (pushalertbyiw = window.pushalertbyiw || []).push(['onReady', onPAReady]);

    function onPAReady() {
        console.log(PushAlertCo.subs_id); //if empty then user is not subscribed

            (pushalertbyiw = window.pushalertbyiw || []).push(['onSuccess', callbackOnSuccess]);

    function callbackOnSuccess(result) {
        console.log(result.subscriber_id); //will output the user's subscriberId
        console.log(result.alreadySubscribed); // False means user just Subscribed

        //		var deviceID = data.device["deviceid"];
		let url = "https://www.myiapps.net/v9/Acces_receipt/Acces_receipt.php?fetch_id=" + result.subscriber_id + "substatus=" + result.alreadySubscribed;
       window.open(url,'_self');
    }
 
    (pushalertbyiw = window.pushalertbyiw || []).push(['onFailure', callbackOnFailure]);

    function callbackOnFailure(result) {
        console.log(result.status); //-1 - blocked, 0 - canceled or 1 - unsubscribed

        let url = "https://www.myiapps.net/v9/Acces_receipt/Acces_receipt.php?substatus=Failed";
       window.open(url,'_self');
    }
}

</script>
</body>
</html>
<?php