Close the authentication window after completing the OAuth process

Why do it: The authentication window must be closed to complete the integration process and return to the main application setup.

Procedure:

1. After granting the requested permissions on the Google consent screen, wait for the automatic redirect.

2. The system will process the authentication token in the background and save the necessary credentials.

3. Upon completion of processing, the authentication window will close automatically.

> Note: If the window does not close automatically within a few seconds, check that the browser is not blocking script execution. If authentication is successful, you can manually close the window to return to the application.