Shopify display Yotpo Reviews using API

Shopify: display Yotpo Reviews using API

var data = JSON.stringify(false);
var xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function () {
  if (this.readyState === this.DONE) {


    var test = this.responseText;
    var json = JSON.parse(test);
    console.log(json);
    var rez = json.response.bottomline.average_score;
    document.getElementById("h1").innerHTML = rez;

    }
  });


xhr.open("GET", "https://api.yotpo.com/v1/widget/{{API-KEY}}/products/371907935/reviews");

xhr.send(data);