I've spent a lot of time on this task and did hours of research but I still don't have a solution to this.

I get an 401 error

But if I add this at the end of the url: ?jsonpcallback=?

I get this in the console: Uncaught SyntaxError: Unexpected token :

Can someone guide me on this please and tell me what I'm doing wrong. Thank you in advance!

Here's my code:

  $.ajax({
        type: "GET",
        url: "XXX/jsonpcallback=?",
        dataType: 'jsonp',
        crossDomain:true,
        success: function (data){
            console.log(data);
        },
        error: function (err) {
            console.log(err)
        }
    });