In order to have to avoid using an HTTP request to check if someone is a ROBLOX administrator, or constantly update a list of admins, a new EnumType, Administrator, should be added to MembershipType. All existing ROBLOX core code that relies on MembershipType.OutrageousBuildersClub (if any does exist) can be updated to treat MembershipType.Administrator as MembershipType.OutrageousBuildersClub. I don’t see in adding a new property to a player, so I feel this would work best.
Problem is that administrators do have memberships too. Why not just have a boolean on the player object? For instance, there’s the IsGuest boolean (I think?) Just something like IsAdministrator or something.