This project demonstrates how to implement Google Authentication in a web application using the Google Cloud Platform (GCP). With Google Authentication, users can easily sign in to your application using their Google credentials.

1. Go to Google Cloud Platform and create a new project.

2. Navigate to "APIs & Services" > "Credentials" in the GCP Console.

3. Click on "Create Credentials" and select "OAuth client ID."

4. Choose "Web application" as the application type.

5. Enter your application's name and authorized JavaScript origins (e.g., http://localhost:3000 for local development).

6. Add "Authorized redirect URIs" (e.g., http://localhost:3000/auth/google/callback).

7. Click "Create" to generate your client ID and secret key.

Create a .env file in the root directory of your project and add the following environment variables:

GOOGLE_CLIENT_ID=your_client_id_here
GOOGLE_CLIENT_SECRET=your_client_secret_here

1. Clone this repository:

   git clone https://github.com/your_username/google-auth-project.git
   cd google-auth-project
   

2. Install the required dependencies using yarn:

   yarn install
   

1. Start the development server:

   npm start
   

2. Open your web application at http://localhost:3000 and test the Google Authentication.

• Express.js: Backend server
• Passport.js: Authentication middleware
• Passport-google-oauth20: Google OAuth 2.0 strategy for Passport.js
• dotenv: For loading environment variables from .env file

Contributions are welcome! If you have any improvements or bug fixes, feel free to submit a pull request.

This project is licensed under the MIT License - see the LICENSE file for details.