const url = "https://kennyoliver.github.io/apis/testing/fake-user-data.json";

function getUserData(URL) {
  fetch(URL)
    .then(res => res.json())
    .then(data => {
      //json vaiable contains object with data
      console.log(data);
      console.log(data[0].id);
      
      console.log("All usernames:");
      for (let i = 0; i < data.length; i++) {
        console.log(data[i].username);
      }
    });
}

getUserData(url);