In addition of issue 2812 and feature 2851 it would be nice to extend the interaction with group-level service-accounts.

Currently only creation is supported, but it would be a nice feature to also support listing and deleting of service-accounts under a specific group.

API documentation:

• https://docs.gitlab.com/ee/api/groups.html#list-service-account-users
• https://docs.gitlab.com/ee/api/groups.html#list-service-account-users