IUserJwtInvalidatedListener 5.9.2 API

```
public interface IUserJwtInvalidatedListener

                    
```
Implement this interface and provide an instance to IOneSignal.addUserJwtInvalidatedListener to be notified when the SDK has detected that the JWT for a user is no longer valid (typically a 401 from the OneSignal backend on a request signed with that JWT).
Threading: delivered on a background dispatcher (OneSignalDispatchers.launchOnDefault). Implementations should not assume a specific thread and should re-dispatch to the UI thread if needed.
Pure pub/sub: only listeners subscribed at the time of the invalidation receive the event. Subscribe early (e.g. in Application.onCreate) to avoid missing cold-start 401s.

Method Summary

Modifier and Type	Method	Description
`abstract Unit`	`onUserJwtInvalidated(UserJwtInvalidatedEvent event)`	Called when the JWT is invalidated for UserJwtInvalidatedEvent.externalId.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - onUserJwtInvalidated
```
 abstract Unit onUserJwtInvalidated(UserJwtInvalidatedEvent event)
```
    Called when the JWT is invalidated for UserJwtInvalidatedEvent.externalId. Apps should use this signal to fetch a fresh JWT from their backend and supply it via IOneSignal.updateUserJwt.
    
    Parameters:
    
    event - Describes which user's JWT was invalidated.