When a user is created, all their information is stored on the server in the QBUser model. You can list a user by their ID or other parameters mentioned in our documentation to retrieve the user. Use our API list users request to list user(s) or our documentation for each SDK:
iOS SDK - Users | iOS SDK | QuickBlox
Android SDK - Users | React Native SDK | QuickBlox
React Native SDK - Users | React Native SDK | QuickBlox
Flutter SDK - Users | Flutter SDK | QuickBlox
Also, you can retrieve users using different filters. Please find more information using the links above.
Feel free to check our official documentation for more information that will help you to integrate QuickBlox services into your applications / projects or contact our Support team by submitting a ticket if you have any other questions.