Disable push channel if subsriber have not credintials for push

Hello, I use NOVU Framework in my application (I have two platform Next.js app and React Native app).
I have workflow to notify user about event change.
How I can disable push step in workflow - if user dont have configured credentials (deviceId) for push notification? When I run workflow I did for this user notification error - Subscriber does not have a configured channel.

Thanks for help