using bcrypt to encrypt password in nodejs/express applications using moongoose...

gistfile1.js

//npm install bcrypt --save  

import bcrypt from 'bcryptjs'; 
import UserModel from '../models/users.js';

export default config = {
    PORT: 5200,
    DB_USER: '.......',
    DB_PASS: '.......',
    DB_NAME: '.......',
    SALT_ROUNDS: 10
};

var salt = bcrypt.genSaltSync(config.SALT_ROUNDS);

export const createUser = async (req, res) => {
    const user = req.body;    
    const hashed = bcrypt.hashSync(user.password, salt); //hash password here.... 
    const userObj = { ...user, password: hashed };  
  ......
};

//controller function to validate and check password.. using bcrypt. 

export const loginUser = async (req, res) => {
    const user = req.body;
    try {
        const userObj = await UserModel.findOne({ email: user.email }).exec();
        if (!mongoose.Types.ObjectId.isValid(userObj._id)) return res.status(404).send('user does not exist'); //check for valid ids...
        const result = bcrypt.compareSync(user.password, userObj.password) == true ? TRUE : FALSE;   
        .....
    } catch (error) {
        res.status(409).json({ message: error.message })
    }

};