Disable Group Email Notifications

Our company uses groups in Gitlab to organize our hundreds of projects and repos by client. To achieve this, we have a cron job that automatically adds all employees to have access to all groups so projects can be added and moved around as needed.

The problem is that when the job adds a user to a group, it sends an email notification. If a new user signs into our system, they get flooded with 20 emails for every individual group they got added to. Is there any good way to disable these group notifications so emails don’t get sent out?

Should I assume there’s no way to achieve this other than changing the ruby code (or disabling emails entirely)?