Mongo user model with validation and exncryption functions

user.js

var mongoose = require('mongoose');
var bcrypt = require('bcrypt-nodejs');

var user = mongoose.Schema({
	local: {
		firstname: String,
		lastname: String,
		email: String,
		password: String
	},
});

user.methods.generateHash = function(password) {
	return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
};
user.methods.validPassword = function(password) {
	return bcrypt.compareSync(password, this.local.password);
};

module.exports = mongoose.model('User' , user);