Nothing. If memory serves, the website wanted some hub info when I first tried to sign up. I got round it by getting the Android app & setting up a username & password on there. After choosing those, there was a 'next' button, and the next page wanted hub info. However, then I just exited the app. The username & password were subsequently active on the website, without needing hub info. When you create a virtual device on the website, which is how I always do it, you pick a device name, device network ID (pick a random number) type=on/off button tile (which is compatible with Alexas on off commands) and the thing which stumped me initially.. Pick a location (I just gave it my name-after your first device you can subsequently pick whatever you called the location from a drop down list). Then the smart things website will accept that as a device. Alexa will subsequently pick up that device as if you have a hub, (as its a cloud connection it reads the devices from), and you authorise Alexa to use the device like normal. Do similar on IFTTT, and then you can use the on or off status of the device as IFTTT triggers. Job done! Honestly I've got loads of these. Even though my Alexa is set to the US system and therefore has IFTTT, I prefer this setup as it's more intuitive to say "turn on the TV" than "trigger TV".