This is a complete authentication system that can be used as a starter code for creating any new express application. It includes sign up, sign in, sign out, reset password, and social authentication using Google. Additionally, it also includes a bonus feature of forgot password functionality. The code is well-commented for easy understanding and scalability. The folder structure is separate for models, controllers, and routes, making it easy to scale the project. This code can serve as a boilerplate for any Express application that requires a basic authentication module.

• Features
• Functionality
• Getting Started
• Dependencies
• Contributing
• License
• Conclusion

• Sign up with email
• Sign in with email
• Sign out
• Reset password after sign in
• Password stored in the db is encrypted
• Google login/signup (Social authentication)
• Forgot password (send a reset password link which expires in some time.)
• Display notifications for unmatching passwords during sign up and incorrect password during sign in
• Re-captcha on both sign up and log in

• Sign Up Users can sign up using their email. The password is encrypted and stored in the database. If the passwords do not match, an error message is displayed. Re-captcha is enabled on the sign-up page.
• Sign In Users can sign in using their email and password. If the email and password are incorrect, an error message is displayed. After sign-in, the user is redirected to a blank home page with sign-out and reset password buttons. Re-captcha is enabled on the sign-in page.
• Sign Out Users can sign out of their account using the sign-out button on the home page.
• Reset Password Users can reset their password after signing in. If the user forgets their password, they can reset it using the forgot password feature. A random password can be generated and sent via email, or a reset password link can be sent, which expires after some time.
• Social Authentication Users can sign up and sign in using their Google account.

To get started with this authentication system, follow the instructions below:

1. Clone this repository to your local machine.
2. Install dependencies by running npm install.
3. Create a .env file in the root directory of the project, and add your environment variables as necessary.
4. Run npm run start to start the application.

This authentication system uses the following dependencies:

• axios: ^1.3.4
• bcrypt: ^5.1.0
• connect-flash: ^0.1.1
• connect-mongo: ^4.4.0-rc1
• cookie-parser: ^1.4.6
• dotenv: ^16.0.3
• ejs: ^3.1.9
• express: ^4.18.2
• express-ejs-layouts: ^2.5.1
• express-session: ^1.17.3
• kue: ^0.11.6
• mongoose: ^7.0.2
• nodemailer: ^6.9.1
• passport: ^0.6.0
• passport-google-oauth20: ^2.0.0
• passport-local: ^1.0.0
• validator: ^13.9.0

Contributions are always welcome! If you want to contribute to this project, please follow the steps below:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/your-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin feature/your-feature)
5. Open a pull request

Please make sure to update tests as appropriate. Also, please ensure that your code follows the existing coding style and conventions.

This project is licensed under the ISC License. See the LICENSE file for more information.

This complete authentication system is a great starting point for any new application that requires user authentication. It includes all the necessary features and functionality, and the code is well-commented and scalable.