use sendgid api to send a mail using a preconfigured template in the sendgrid web console

sendgrid.js

require('dotenv').config()
const sgMail = require('@sendgrid/mail')

sgMail.setApiKey(process.env.SENDGRID_API_KEY)

const msg = {
  to: process.env.RECIPIENT,
  from: process.env.SENDER,
  templateId: process.env.SENDGRID_TEMPLATE_KEY,
  dynamicTemplateData: {
    user: 'John Doe',
    message: 'call the president ...',
  },
};

sgMail
  .send(msg)
  .then(() => {
    console.log('Email sent')
  })
  .catch((error) => {
    console.error(error)
  })