// each function returns a Promise
const {guessAuthor, guessEmail, guessGitHubUsername} = require('conjecture');
 
// guessGitHubUsername takes an optional "email" parameter
Promise.all([guessAuthor(), guessEmail(), guessGitHubUsername()])
  .then(([author, email, githubUsername]) => {
    console.log(author); // Christopher Hiller
    console.log(email); // boneskull@boneskull.com
    console.log(githubUsername); // boneskull  
  });