send mail in node js without password

To send mail in Node.js without a password, you can use OAuth2 authentication with a service account. Here are the steps to achieve this:

1. Set up a Google Cloud Platform (GCP) project.
2. Create a service account for the project.
3. Generate a private key for the service account.
4. Enable the Gmail API for the project.
5. Use the generated private key to authenticate the service account in your Node.js application.
6. Send emails using the Gmail API in your Node.js application.

This approach allows you to send emails without having to store or use a password directly in your Node.js code, enhancing security and reducing the risk of unauthorized access to your email account.