How to add "works with Ring" lighting

I am trying to move my outlets and lighting from the old system (SmartThings) to the Ring Alarm base station I just set up. There seems to be very little information on how to do this.This page ([https://support.ring.com/hc/en-us/articles/360026427491-Works-With-Ring-Basic-Information](https://support.ring.com/hc/en-us/articles/360026427491-Works-With-Ring-Basic-Information)) mentions "_Standard setup through Ring app's "add manually" function or following manufacturer’s instructions._" but I cannot find any such function in the Ring app (Dec 13, 2019 version).I could keep the old Smartthings hub but I'd ratehr not have two z-wave networks in the house.what am I missing?