Type Aliases The following type aliases are available globally. UserStateChangeCallback Callback type when registered to notifications for change in UserState. The dictionary contains information like provider which the user signed in with. Declaration Swift public typealias UserStateChangeCallback = (UserState, [String : String]) -> Void © 2020 Amazon Web Services, Inc.. All rights reserved. (Last updated: 2020-03-26) Generated by jazzy ♪♫ v0.13.1, a Realm project.