Waiting for multiple AJAX requests, the latter is conditional

gistfile1

new RSVP.promise(function(resolve, reject) {
  var promise = new RSVP.promise(function(resovle, reject) {
    request({
      dataType: 'json',
      url: window.ENV.prependHost + "/sa/api/v2/auth"
    })
    .then(resolve) // if the first is a success, just resolve!
    .catch(function() { // not a success, trying again
      request({
        dataType: 'json',
        url: window.ENV.prependHost + "/sa/api/v2/auth"
      })
      .then(resolve) // the second is a success, resolve!
      .catch(reject) // the second failed :( reject
    });
  });

  var promise2 = new RSVP.promise(function(resolve, reject) {
    promise.then(function() {
      request({
        dataType: 'json',
        url: 'the/url/for/user/data'
      }).then(resolve).catch(reject);
    })
  });

  promise2.then(function() {
    // should resolve the user data upon successful auth
  }).catch() {
    // either we couldn't auth
    // or the user data wasn't retrieved.
    // in a simple case, we don't know what ... 
    // but you could reject with an arg to indicate which
  }
});