Through the IDE… Samsung account
Check this thread… FAQ: Creating a virtual Groovy Device [OBSOLETE]
The thread strays a little off topic, but I think you’ll find the 2nd post most helpful.
There is also a SmartApp called Virtual Device Creator, but I honestly cannot remember if I set that up in the classic app or the new app one. You can check if it’s available in the new ST app by touching the 3 bars at the top left corner, touching SmartApps and touching the plus symbol at the top. There you will find a list of available SmartApps that you can set up.
Edit: There is an option in the IDE to use Simulated Presence Sensor as the type. I don’t know if this works or not… I just use the Virtual Switch type because it gives me the option to control the switch (by turning it off and on in the ST app) if my actual presence devices are not updating fast enough. I haven’t had to do that yet, but I can if I need to. I’m not sure if a Simulated Presence Sensor has that capability.