I am trying to show my ajax json response into data table. I am using datatable AJAX option but nothing is working.

$(document).ready(function() {

      $('#example').dataTable( {
            "ajax": {
            "url": "https://2057-185-202-239-227.ngrok.io/serviceprovider/billByServiceProvider",
            "contentType": "application/json",
            "type": "POST",
            "data": function ( d ) {
            return JSON.stringify( d.serviceProvider = sessionStorage.getItem("Services_id") );
             },
             "dataSrc": function(json){
                console.log(json);
             }
         }
    }); 
    });

Thanks in advance for help :)