With the lack of submitMulti via daml script on DAML Hub. It seems the best way to set readAs is using users, though it seems I can’t actually create any Users on DAML Hub as my User tab is missing
@dylan_obsidian Exposing user management in DamlHub is currently being worked on and should be available by Q3 2023 - we will update on this post as soon as it is made available.