Returns whether the current user is entitled to the current app. The primary purpose of this function is to verify user access rights to the application, ensuring that the user is authorized to use it. See example usage here.A message with type ovrMessage_Entitlement_GetIsViewerEntitled will be generated in response.First call ovr_Message_IsError() to check if an error occurred.This response has no payload. If no error occurred, the request was successful. Yay!