Including API key in the header :(

Is an API key even needed? This works for me:

let spid;

function preload() {
  spid = loadJSON('https://static.api.nexon.co.kr/fifaonline4/latest/spid.json');
}

function setup() {
  console.log(spid[0]);
}

Resulting in this output:

Object {id: 101000001, name: "데이비드 시먼"}
 id: 101000001
 name: "데이비드 시먼"