# onCredentialsRequired

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.

#### Parameters

clientRegistration

callback object to operate on when informing Sinch SDK about authentication result.

#### See also

ClientRegistration