find users by mail domain

Problem to solve

I want to search all users with a specific mail domain in my Gitlab instance

Intended users

admin

Further details

I run a small GitLab instance (Onmibus in VM) and allow my customers to use it. I don't want to extend the instance in terms of reliability. At a certain point customers should decide for themselves if they want to run their own Gitlab. It would be good if I could search users for the domain of a mail to underline the importance of communication via Gitlab. At the moment I can only appreciate it.

Proposal

a search for @example.com should mstch users with such a maildomain.