<!-- This template is a great use for issues that are feature::additions or technical tasks for larger issues.--> ### Proposal <!-- Use this section to explain the feature and how it will work. It can be helpful to add technical details, design proposals, and links to related epics or issues. --> **Submitting on behalf of a GitLab SaaS user:** For Gitlab SaaS, as a group owner, we need an API to be able to search group members by `extern_uid`: **Use case:** We need our automation to be able to search for group members based on SAML `extern_uid` so they can be removed from our Gitlab group immediately when the employee is terminated. **Impact:** Since Gitlab sessions can last several hours, we need an API call to identify and remove an employee, based on their SAML Extern_ID, automatically from our Gitlab group as soon as the employee is terminated. We don’t use SCIM. <!-- Consider adding related issues and epics to this issue. You can also reference the Feature Proposal Template (https://gitlab.com/gitlab-org/gitlab/-/blob/master/.gitlab/issue_templates/Feature%20proposal.md) for additional details to consider adding to this issue. Additionally, as a data oriented organization, when your feature exits planning breakdown, consider adding the `What does success look like, and how can we measure that?` section. -->