const request = require('request');

const options = {
  url: 'https://lnp....api.infobip.com/email/1/send',
  reqType: "POST",
  json: {
    from: 'Rodrigo <cop@sd1...m>',
    to: 'rodrc...il.com',
    subject: 'Test Subject',
    html: '<h1>Html body</h1><p>Rich HTML message body.</p>'
},
  headers: {
    'Authorization': 'App ca8c0e09e3ad4058f5b...',
    'Content-Type': 'application/json',
    'Accept': 'application/json'
  }
}

request.post(options,(err, response) => {
  if (err){
    return console.log(err)
  }

  console.log(`Status code: ${response.statusCode}. Message: ${response.body}`);
});