Send mail firebase function api

nodemailer.js

import * as functions from 'firebase-functions'
import * as nodemailer from 'nodemailer'
import * as cors from 'cors'

const corsHandler = cors({ origin: true })

export const form = functions.https.onRequest((req, res) => {
  const corsFn = cors()
  corsFn(req, res, function() {
    process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0'
    const { name, email, budget, message } = req.query
    const transporter = nodemailer.createTransport({
      service: 'gmail',
      host: 'smtp.gmail.com',
      auth: {
        user: 'YOUR_EMAIL',
        pass: 'YOUR_MAIL_PASSWORD'
      }
    })
    const mailOptions = {
      from: 'YOUR_SENDER_EMAIL',
      to: 'YOUR_RECEIVE_MAIL',
      subject: '🏹 Submit form from.... ✅',
      html: `
          Name: <b>${name}</b><br/>
          Email: <b>${email}</b><br/>
          Budget: <b>${budget}</b><br/>
          Message: <b>${message}</b><br/>
        `
    }

    transporter.sendMail(mailOptions, (error, info) => {
      if (error) {
        console.log(error)
        res.status(402).json({
          error: 'Mail send error. Please try again'
        })
      }
      console.log(info)
      res.status(200).json({
        message: 'Mail send success'
      })
    })
  })
})