Correct API call for Warp/events app

kiwi-spayc-maps.js

var data = new FormData();
data.append("center_latitude", "40.785091");
data.append("center_longitude", "-73.968285");
data.append("endpoint_latitude", "38.889931");
data.append("endpoint_longitude", "-77.009003");
data.append("radius", "20000");

var xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function () {
  if (this.readyState === 4) {
    console.log(this.responseText);
  }
});

xhr.open("POST", "http://spayc-staging.kiwireader.com/api/map-spaycs.json");
xhr.setRequestHeader("TOKEN", "<YOUR_TOKEN>");
xhr.setRequestHeader("timezone", "America/New_York");
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
xhr.setRequestHeader("cache-control", "no-cache");

xhr.send(data);