nested-promise.js

// option one - using Promise.all - I like this the most
asyncAuth()
  .then(user => {
    return Promise.all([user, asyncFetch(user)])
  })
  .then(([user, data]) => {
    // ...
  });

// option two - nesting
asyncAuth()
  .then(user => {
    return asyncFetch(user)
        .then(data => {
          // ...
        });
  });

// option three - I'll kill you
let user;
asyncAuth()
  .then(u => {
    user = u;
    return asyncFetch(user)
  })
  .then(data => {
    // ...
  });