@Aaron there seems to be a bug with the IDE/API thats to do with the authentication between US and EU.
If you go to www.graph.api.smartthings.com and sign in, none of my devices appear. It seems at this point, we’re connected to the US servers, which is why when I originally added my WeMo Smart App, it never appeared on my phone.
If however, you then click the “My Locations” tab, you get booted out of the service, and you need to sign in again. You will notice that the URL is now:
This is the EU server, and anything you do here will show up on your EU device. Might be worth pointing out to the team if they’re not already aware.