function fetchEmail(githubUsername) {
  return fetch(`https://api.github.com/users/${githubUsername}`)
    .then((response) => response.json())
    .then((profile) => {
      return profile.email;
    })
    .catch((reason) => {
      console.log(`Couldn't fetch username`, reason);
      throw reason;
    });
}

async function fetchEmail(githubUsername) {
  try {
    let response = await fetch(`https://api.github.com/users/${githubUsername}`);
    let profile = await response.json();
    return profile.email;
  } catch (reason) {
    console.log(`Couldn't fetch username`, reason);
    throw reason;
  }
}