var email = nodemailer.createTransport("STMP", {
service: "Sendgrid",
auth: {
    user: "username",
    pass: "pass"
}
})

var email = nodemailer.createTransport("STMP", {
service: "Sendgrid",
auth: {
    user: "user",
    pass: "pass"
}
})

var email = nodemailer.createTransport("SMTP", {
service: "SendGrid",
auth: {
    user: "user",
    pass: "pass"
}
});