Adobe Acrobat Pro DC Dynamic Stamp Javascript to display User ID

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I have watched more tutorials and read more articles than one should ever have to watch/read on this topic, and yet I still can't seem to find the answer for what Javascript to insert into the custom calculation script in order to display the User identity of the document. Please can somebody help, I'm a Javascript novice.

Using a mac. I've tried to look at the Javascript of the existing Dynamic Stamps that come preloaded with the program, but for some reason I can't seem to see the Annotations folder in the Plug-ins folder.

This Youtube video was the closest I got to coming right: Adobe Acrobat DC Dynamic Stamp Tutorial - YouTube

I inserted the following script, but it had issues with the first two lines of script and it didn't seem to like the hashtag either:

var cAsk = “Enter a name”;

var cTitle = “Document State for Stamp”;

if(event.source.forReal &&

  (event.source.stampName == “#templatename”))

{

  event.value = app.response(cAsk, cTitle);

}

Thanks in advance!