We should consider moving the audit hooks from the User Management Commands to the AuthOpObserver, which would invoke them solely on primaries. When a primary performs a write to these system collections, either as a part of a User Management Command or as part of a CRUD operation, the hook will check whether the generated oplog event implies that an authorization audit event should be recorded. If yes and the current node is a primary, it will invoke the audit hook. Because primaries invoke OpObserves in the catalog layer while clients perform operations, the active OperationContext will contain the client's authentication and authorization state.