According to the screenshot on Figma above, it appears to display a list of "staff" role with username, email. The existing API can be used for this:

POST /courses/{course_id}instructor/api/list_course_role_members will return an object containing the list of rolename for a specific course:

{
        "course_id": "some/course/id",
        "staff": [
            {
                "username": "staff1",
                "email": "staff1@example.org",
                "first_name": "Joe",
                "last_name": "Shmoe",
            }
        ]
    }

where staff in the above can be any rolename of ['instructor', 'staff', 'beta', 'ccx_coach'] which is included in the request payload. In our case, we want to send rolename=staff. Currently the API does not support search or pagination.