How do I display the values under StratusFormsRepeatable?

Blubeacon

I'm new to Datatables but was able to figure out how to list the ID#, Title, and StratusFormsData columns but I want to create columns for the other data that comes after StratusFormsRepeatable (jpg attached) but can't figure out how to get to it. How do I display the first and last name for example? Here is the code that is working for me so far.

<script type="text/javascript">

function LoadISSRs(projects)
{
        var call = $.ajax({
            url: "https://walgreens.sharepoint.com/teams/W_IT1/CISO/ISSR/" + "_api/web/lists/getByTitle('Database')/items?"+"$select=ID,Title,Created,StratusFormsData&$expand=StratusFormsRepeatable&$top=550",
            type: "GET",
            dataType: "json",
            headers: {
                Accept: "application/json;odata=verbose"
            }
       
        });
        call.done(function (data,textStatus, jqXHR){
            $('#issr').dataTable({
                "bDestroy": true,
                "bProcessing": true,
                "data": data.d.results,
                "columns": [
                    { "data": "ID" },
                    { "data": "Title" },
                    { "data": "Created" },
                    { "data": "StratusFormsData" }                    
                ]
              });
        });
        call.fail(function (jqXHR,textStatus,errorThrown){
            alert("Error retrieving Tasks: " + jqXHR.responseText);
        });
}

</script>