How to send an email via the Pebble using the Mailjet API

Pebble-Mailjet.js

/**
 * Welcome to Pebble.js!
 *
 * This is where you write your app.
 */

var UI = require('ui');
var Vector2 = require('vector2');
var ajax = require('ajax');

var main = new UI.Card({
  title: 'Pebble.js',
  icon: 'images/menu_icon.png',
  subtitle: 'Hello World!',
  body: 'Press any button.',
  subtitleColor: 'indigo', // Named colors
  bodyColor: '#9a0036' // Hex colors
});

main.show();

main.on('click', 'up', function(e) {
  var menu = new UI.Menu({
    sections: [{
      items: [{
        title: 'Pebble.js',
        icon: 'images/menu_icon.png',
        subtitle: 'Can do Menus'
      }, {
        title: 'Second Item',
        subtitle: 'Subtitle Text'
      }]
    }]
  });
  menu.on('select', function(e) {
    console.log('Selected item #' + e.itemIndex + ' of section #' + e.sectionIndex);
    console.log('The item is titled "' + e.item.title + '"');
  });
  menu.show();
});

main.on('click', 'select', function(e) {
  var wind = new UI.Window({
    fullscreen: true,
  });
  var textfield = new UI.Text({
    position: new Vector2(0, 65),
    size: new Vector2(144, 30),
    font: 'gothic-24-bold',
    text: 'Text Anywhere!',
    textAlign: 'center'
  });
  wind.add(textfield);
  wind.show();
});

main.on('click', 'down', function(e) {
  var card = new UI.Card();
  card.title('A Card');
  card.subtitle('Is a Window');
  card.body('The simplest window type in Pebble.js.');
  card.show();
  
// Here is where starts the mailjet API usage
// acording to http://dev.mailjet.com/guides/?shell#sending-a-basic-email
ajax(
  {
    url: 'http://APIJET:APISECRET@api.mailjet.com/v3/send',
    method: 'post',
    type: 'json',
    data:  {
  "FromEmail":"FIXME@domain.com",
  "FromName":"FIXME",
  "Subject":"FIXME",
  "Text-part":"Dear passenger, welcome to Mailjet! May the delivery force be with you!",
  "Html-part":"<h3>Dear passenger, welcome to Mailjet!</h3><br />May the delivery force be with you!",
  "Recipients":[{"Email":"FIXME@domain.com"}]
    },
    crossDomain: true
  }, 
   function(result) {
     console.log('Success and Result is: ' + result);
  },
  function(error) {
    console.log('The ajax request failed: ' + error);
  } 
 );
});