To create the Google Meet meeting room from Moodle, the Google Meet™ for Moodle plugin needs the API key and the OAuth client ID of the Google APIs. To learn how to create the API key and OAuth client ID, click here.
and on that page link above:
* Your Moodle site must use HTTPS.
* You must use a Google Workspace organizational account (formerly G Suite) to create the keys. It is possible to create the keys with a personal account, but you will have to go through Google verification before using it in production.
Teachers who will use the Google Meet™ for Moodle plugin must also have an account with the same organization. If you intend to create the keys with a personal account, this is not necessary.