Implement a mailing solution in Express nodejs - node.js

Question

I'm creating an API that handles account verification via email, password recovery and possibly other things.
I want to create one place to send emails across my entire API.
i'm using nodeMailer.
My current setup is i'm a calling a method on the user model that send EmailVerification email.
I want to create a template outside the User model that could send either password recovery, email verification or other things.. Depending on the params that i pass to the function.
My user model:
userSchema.methods.generateEmailVerificationToken = function() {
const token = jwt.sign({_id: this._id, role: this.role},
config.get('jwtPrivateKey'));
return token;
};
userSchema.methods.generateAuthToken = function() {
const token = jwt.sign({_id: this._id, role: this.role},
config.get('jwtPrivateKey'));
return token;
};
userSchema.methods.sendEmailVerification = function (user) {
sendMail(user);
};
and this is my sendMail function:
const nodemailer = require('nodemailer');
module.exports = function sendMail (user) {
const transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: 'mymail#gmail.com',
pass: 'mypass'
}
});
const mailOptions = {
from: 'mymail#gmail.com',
to: user.email,
subject: 'Email verification.',
html: `Please click this link to verify your email`
};
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
} else {
console.log('Email sent: ' + info.response);
}
});
}
Thank you