We are using ODK Collect as our mobile data capture tool. We can synchronise our application's users with the ODK Aggregate users automatically but we have not found a way to actually get the user name from the form instance. This is important for audit purposes. We know it is stored it _CREATOR_URI_USER but want to avoid querying the database directly as it is possible that the structure of the database changes over time. Is there no way to get this out of the system as a metadata element using an API or preloaded form field. I know the username can be added to a form, but this is the freely configurable name set up on the mobile phone and not the ODK login name.