I'm following this guide to connect one of my devices(raspberry pi).
I have the DEVICE_ID and DEVICE_CREDENTIAL because that's what I set up in the control panel. I also need to fill in a USER_ID, i tried entering my username but it doesn't work.
From the arduino documentation I can derive that I need my username, which I did fill in but it still doesn't work. (yes I have a thinger server running)
What do I need to fill in in USER_ID ?