I'm provisioning groups in my Google Apps domain via the Admin SDK. From the info at https://developers.google.com/admin-sdk/directory/v1/reference/members it tells me that "An OWNER does not need to be a member of the group"
I presume this to mean that if I want to set an owner to also be a member, I would need to add a member object with role "OWNER" as well as adding that same user with role "MEMBER". So I've tried adding a user to a group as an "OWNER", but when I then try to add the same user as a "MEMBER" I get a 409 error "Member already exists".
This leads me to believe that an Owner is automatically a member of the group, contrary to the documentation. If this is not the case, how does one create an owner that is not a member of the group?