Postfix Gmail SMTP Authentication Issue Fix

I am currently facing a Gmail SMTP authentication issue with my Postfix email server hosted on Google Cloud Platform. The server is all set up, DNS records are configured for Google Workspace, but it still fails to send emails due to authentication problems. Here is what I need:

- Troubleshooting and identification of the Gmail SMTP authentication issue
- Resolution to ensure Postfix can successfully send emails through Gmail's SMTP
- Proper configuration of Google Workspace API for sending emails via Postfix

Ideal Skills and Experience:
- Proven experience with Postfix and Gmail SMTP configuration
- Strong understanding of Google Cloud Platform and Google Workspace
- Deep knowledge of setting up and working with APIs, specifically Google Workspace API
- Excellent troubleshooting skills to identify and resolve authentication issues
- Good communication and reporting skills to keep me updated on the progress and any changes made to the setup

If you have the right skills and experience in this area, I'd like to hear from you.