Read the sharepoint 2013 list data using REST and render into Table

var urllink="https://stagetest.com";
var username="";

var listItemInfoAdmin1 ="";
var listItemInfoAdmin2 ="";
var listItemInfoCOS ="";

$(document).ready(function () {
   username = $("#peoplepickerID").text();
   //alert(username);
   AdminSupportStaff1();
   AdminSupportStaff2();
   ChiefOfSupportStaff();
   

    });

function AdminSupportStaff1() {
    $.ajax({
        url: urllink + "/sites/DL/LD/_api/web/lists/getbytitle('People')/items?$filter=AdminSupportStaff eq '" + username + "'",        
        type: "GET",
        headers: { "Accept": "application/json;odata=verbose" },
        cache: false,
        success: function (data) {

               $.each(data.d.results, function (key, value) {
                               
                               listItemInfoAdmin1 +="<tr><td>"+value.First_x0020_Name+" "+value.Last_x0020_Name+"</td><td>Admin</td></tr>";
                               
        
        });  
         $('#tableSupport').append(listItemInfoAdmin1);     
        //$("#countmein").html(listItemInfo);  
  
        },
        error: function (data) {
            //myApp.hidePleaseWait();
                              //            DisplayErrorMessage(errorMsg);
                                             alert("Error");
        }

    });
}


function AdminSupportStaff2() {
    $.ajax({
        url: urllink + "/sites/DL/LD/_api/web/lists/getbytitle('People')/items?$filter=AdminSuppoprtStaff2 eq '" + username + "'",          
        type: "GET",
        headers: { "Accept": "application/json;odata=verbose" },
        cache: false,
        success: function (data) {

               $.each(data.d.results, function (key, value) {
                               
                               listItemInfoAdmin2 +="<tr><td>"+value.First_x0020_Name+" "+value.Last_x0020_Name+"</td><td>Admin</td></tr>";
                               
        
        });  
         $('#tableSupport').append(listItemInfoAdmin2);     
        //$("#countmein").html(listItemInfo);  
  
        },
        error: function (data) {
            //myApp.hidePleaseWait();
                              //            DisplayErrorMessage(errorMsg);
                                             alert("Error");
        }

    });
}

function ChiefOfSupportStaff() {
    $.ajax({
        url: urllink + "/sites/DL/LD/_api/web/lists/getbytitle('People')/items?$filter=ChiefOfSupportStaff eq '" + username + "'",          
        type: "GET",
        headers: { "Accept": "application/json;odata=verbose" },
        cache: false,
        success: function (data) {

               $.each(data.d.results, function (key, value) {
                               
                               listItemInfoCOS +="<tr><td>"+value.First_x0020_Name+" "+value.Last_x0020_Name+"</td><td>Chief of staff</td></tr>";
                               
        
        });  
         $('#tableSupport').append(listItemInfoCOS);     
        //$("#countmein").html(listItemInfo);  
  
        },
        error: function (data) {
            //myApp.hidePleaseWait();
                              //            DisplayErrorMessage(errorMsg);
                                             alert("Error");
        }

    });
}