Mailgun Zeit Micro Nodejs

mail.js

const {buffer, text, json} = require('micro')
const Mailgun = require('mailgun-js')
const mailgun = new Mailgun({apiKey: 'api_key', domain: 'domain'})

module.exports = async (req, res) => {
  const js = await json(req)
  const data = {
    from: js.from,
    to: 'contact@upsie.com',
    subject: 'Hello from Mailgun',
    html: 'Hello, This is not a plain-text email, I wanted to test some spicy Mailgun sauce in NodeJS!'
  }

  mailgun.messages().send(data, function (err, body) {
    if (err) {
      console.log("got an error: ", err)
      return err
    }
    else {
      return 200
    }
  })
}