bcrypt

npm install bcrypt

// models/user.js
const mongoose = require('mongoose');

const userSchema = new mongoose.Schema({
  username: { type: String, required: true },
  password: { type: String, required: true },
});

const User = mongoose.model('User', userSchema);

module.exports = User;

const express = require('express');
const router = express.Router();
const User = require('../models/user');
const bcrypt = require('bcrypt');

// Signup
router.post('/signup', async (req, res) => {
  const { username, password } = req.body;

  try {
    const hashedPassword = await bcrypt.hash(password, 10);
    const user = new User({ username, password: hashedPassword });
    await user.save();
    res.status(201).json({ message: 'User created successfully' });
  } catch (error) {
    console.error(error);
    res.status(500).json({ message: 'Internal server error' });
  }
});


// Login
router.post('/login', async (req, res) => {
  const { username, password } = req.body;

  try {
    const user = await User.findOne({ username });
    if (user) {
      const isPasswordValid = await bcrypt.compare(password, user.password);
      if (isPasswordValid) {
        res.status(200).json({ message: 'Login successful' });
      } else {
        res.status(401).json({ message: 'Invalid credentials' });
      }
    } else {
      res.status(401).json({ message: 'Invalid credentials' });
    }
  } catch (error) {
    console.error(error);
    res.status(500).json({ message: 'Internal server error' });
  }
});

module.exports = router;