Hello Apple Developer Support, I'm developing an iOS application called LuckyWinston that uses CloudKit for its backend. I'm trying to assign a custom CloudKit security role to a specific user in the public database. However, I've encountered the following issues: The built-in Users record type cannot be queried normally. Attempting to fetch the user record directly by its record ID also fails. I haven't found a supported method in the current CloudKit Console for assigning a custom security role to an individual user. I understand that CloudKit restricts queries against its built-in user records, but I would like clarification on how developers are expected to assign custom security roles. My questions are: Is assigning custom security roles to individual CloudKit users still supported? If so, what is the correct procedure using the current CloudKit Console or supported APIs? Is there an alternative supported method for assigning user-specific permissions without exposing sensitive records? If individual custom-role assignments are no longer supported, what architecture does Apple recommend? I want to ensure that LuckyWinston follows Apple's recommended CloudKit security practices before proceeding further. Thank you for your assistance.