The subscriber function that is invoked whenever an SDK Authentication error occurs. It is
invoked with an object containing the errorCode, reason for the error, the userId of the request (if the
user is not anonymous), and the authentication signature that caused the error.
The identifier of the subscription created. This can be passed to [['removeSubscription`]] to cancel the subscription. Returns undefined if the SDK has not been initialized.
Subscribe to be notified of network request failures that occured due to an SDK Authentication error. This method can be used to determine when to call [[
setSdkAuthenticationSignature]] to provide the SDK with a new signature. If you do not have SDK Authentication enabled on the Braze dashboard, this subscription will never be invoked.