The Nuki app guides you through the initial Smart Lock setup
1) Connect your Smart Lock with the Nuki app
2) Select your door fitting
To prevent your guests from pairing their smartphone directly with your Smart Lock, Bluetooth pairing can be disabled. Open the Nuki app and go to: "Settings" > "Features & Configuration" > "Button & LED" and deactivate the option "Bluetooth Pairing". If Bluetooth pairing is disabled, new users can only be added via invitation code.