Can you updated the README Guide for use with New SmartThings App as Classic is not available in App Store anymore. Getting the App URL and App ID is unclear now that there is no Classic App please.
ah sadly my mobile device is an Android (Samsung Galaxy note 10+ with One UI 3.0 to be precise). I still don't seem to be able to find a way. The challenges of a mixed operating environment. I will likely revert to iOS devices in the fall.