Adobe Embed API Error Handling

Hello,

We are trying to implment error handling in the event of a client inputing an incorrect ClientId/API Key, or in the off chance that the Adobe Embed Service is down.  Is there any callback or way inside the sdk to watch for/manage errors?

For the ClientID/API Key, we can see that https://viewlicense.adobe.io/viewsdklicense/jwt is called and fails in the event of a bad key, however we do not see any way to hook into this to provide additional customer messaging.

Thank you.