Parse sending

sg.js

var sendgrid = require('sendgrid');
sendgrid.initialize('SENDGRID-USERNAME', 'SENDGRID-PASSOWORD');

var email = sendgrid.Email();
email.addTo('john@email.com');
email.setFrom('doe@email.com');
email.setSubject('Hello!');
email.setText('YAY');
email.addFilter("templates", "enabled", "1");
email.addFilter("templates", "template_id","the_code_of_the_needed_template");
sendgrid.sendEmail(email, {
    success: function(httpResponse) {
        console.log(httpResponse);
        response.success("Email sent!");
    },
    error: function(httpResponse) {
        console.error(httpResponse);
        response.error("Uh oh, something went wrong");
    }
});