Invalid username and password
This test application allows you to create virtual devices and import them into your SmartThings location using ST Schema. Virtual devices look and work just a real devices do in the SmartThings app. They respond to commands and generate events that can be used for automation triggers.
This application does not use your SmartThings credentials for login. You can create an account with any username and password, just as you would in another IoT cloud app that you are integrating to SmartThings with ST Schema. Passwords you enter here are encrypted with a salted hash before storage, so that they aren't readable by anyone.
In order to use this application you should visit https://st-schema.com in a web browser to create an account and some test devices. You can then connect that account to SmartThings using this page.