To use this app, you'll need to create a credentials.json file to authenticate with Google. Follow these steps:
Go to the Google Cloud Console.
Create a new project or select an existing project.
Enable the Gmail API for your project.
Create credentials for your project. You will receive a JSON file containing your credentials. Save this file as credentials.json in the root of your project directory.
Note: Keep your credentials.json secure. Do not share it publicly.
Run npm install
Run npm start