user.js

var mongoose = require('mongoose');
var bcrypt = require('bcrypt-nodejs');
var Schema = mongoose.Schema;
/**
 * Creating user schema.
 * @type {*|Schema}
 */
var UserSchema = new Schema({
    name: String,
    username: {type: String, required: true, index: {unique: true}},
    password: {type: String, required: true, select: false}
});
/**
 * Encrypting the user password.
 */
UserSchema.pre('save', function (next) {
    var user = this;
    if (!user.isModified('password')) return next();
    bcrypt.hash(user.password, null, null, function (err, hash) {
        if (err) return next(err);
        user.password = hash;
        next();
    });
});

UserSchema.methods.comparePassword = function (password) {
    var user = this;
    return bcrypt.compareSync(password, user.password);
};

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