Sending some ajax data to reqr.es

hero.js

data = {
        name: "paul rudd",
        movies: ["I Love You Man", "Role Models"]
 }

var xhr = new XMLHttpRequest();
  xhr.onreadystatechange = function(){
    if (xhr.readyState === 4 && xhr.status === 201) {
    console.log(xhr.response);
  }
}      
xhr.open("POST", "http://reqr.es/api/users", true);
xhr.send(stringify(data));