this is pretty straight forward implementation, only once concern i have, as GroupsService also has same functionality, but just for group service accounts.
Therefore reused ListServiceAccountOptions as they are same. If i would change this, then it could break already existing implementations.
First try to contribute to this awesome project.
Implementing ListServiceAccounts from https://docs.gitlab.com/ee/api/user_service_accounts.html#list-all-service-account-users
this is pretty straight forward implementation, only once concern i have, as GroupsService also has same functionality, but just for group service accounts. Therefore reused ListServiceAccountOptions as they are same. If i would change this, then it could break already existing implementations.
this could fix: https://github.com/xanzy/go-gitlab/issues/2011