User Authentication App (Node.js + Express + MongoDB)

This is a simple User Authentication web app using Node.js, Express, MongoDB, and bcrypt. It provides registration and login functionality with password hashing and serves static HTML pages.

Project Structure

.

├── models/

│ └── user.js

├── public/

│ ├── login.html

│ └── register.html

├── .env

├── index.js

├── package.json

└── README.md

Features

• User Registration (/register)

• User Login (/login)

• Password hashing with bcrypt

• MongoDB connection with mongoose

• Simple frontend using static HTML

Setup Instructions

1. Clone the Repository

git clone https://github.com/your-username/auth-app.git
cd auth-app

2. Install Dependencies

npm install

3. Add a .env File

Create a .env file in the root directory:

MONGO_URI=your_mongodb_connection_string
PORT=3000

Replace your_mongodb_connection_string with your actual MongoDB URI.

4. Run the Application

node server.js

5. Visit in Browser

• Registration Page: http://localhost:3000/register

• Login Page: http://localhost:3000/login

API Endpoints

POST /register

Register a new user.

Body Parameters:

{
  "username": "yourname",
  "email": "your@email.com",
  "password": "yourpassword"
}

POST /login

Login with registered email and password.

Body Parameters:

{
  "email": "your@email.com",
  "password": "yourpassword"
}

ScreenShots

register

login

Tech Stack

• Node.js

• Express.js

• MongoDB & Mongoose

• Bcrypt (for password encryption)

• dotenv

• HTML/CSS

Security Note

Passwords are hashed using bcrypt before saving to the database.

For production, consider implementing sessions or JWTs for user authentication.