Help me please Build DataTable with JSON

Hello, I need help please. How to build a table from my data in Json format using DataTables?

I write this code, but it did not work:

  var testdata = '[{"name":"Jhon","age":"23","sex":"M","phone":"210-828-5555"},{"name":"Barack","age":"30","sex":"M","phone":"210-828-4444"}]';
          
          $('#example').dataTable(
             {
                 "aaData": testdata,
                 "aoColumns": [{ "mDataProp": "name" },
                     { "mDataProp": "age" },
                     { "mDataProp": "sex" },
                     { "mDataProp": "phone" }
                  ]
             }
             );

Thanks!