# UserRegistrationCallback

interface UserRegistrationCallback

Callback for User Registration flow events.

#### Inheritors

SinchClientListener

## Functions

onCredentialsRequired
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abstract fun onCredentialsRequired(clientRegistration: ClientRegistration)

Called when SDK needs to verify user's identity within your application. See Authentication $ Authorization (https://developers.sinch .com/docs/in-app-calling/android/application-authentication/) section of the online docs for more information about the flow.

onUserRegistered
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abstract fun onUserRegistered()

Informs that user has been successfully registered.

onUserRegistrationFailed
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abstract fun onUserRegistrationFailed(error: SinchError)

Informs that user registration has failed and Sinch SDK will not function properly.