getImageQueryForGithubUser = async function(username, size) {
  // get the image url
  const imageUrl = `https://github.com/${username}.png?size=${size}`;
  return { imageUrl, width: size, height: size, fit: "cover" };
}
Get image query data for a GitHub user, return { imageUrl, width, height, fit }
@param {string} username
@param {Number} size