How to distinguish Shared Device & Personal Device

You could call from your skill the resolveRoom API https://docs.aws.amazon.com/a4b/latest/APIReference/API_ResolveRoom.html

When you get room name back, it will be a shared device. When no room is returned, the request is coming from a personal device.

Thanks for the prompt feedback, milo@aws.

When calling ResolveRoom for Personal Device, are we supposed to get a response but without any RoomArn? or we should get an Error? Because I am getting this:

"errorMessage": "An error occurred (ValidationException) when calling the ResolveRoom operation: User ID is invalid, for a different skill or does not currently have room information associated with it"

Just want to ensure that this is the expected behavior. Thanks.

The error message is correct.