I’ve used the app and device handler created by @RBoy, and can verify that it works very well and is full featured.They also have very responsive support if you encounter issues with their apps or device handlers. The combination of their app and device handler will also tell you whose code was entered, which can be used for user specific automations. Definitely worth the lifetime subscription. @RBoy is also the official developer for Monoprice device handlers.
Unlike Bluetooth, Z-wave works as a mesh network, so you should either have your SmartThings hub near the lock (< 10 ft away), or install a z-wave switch or outlet within ~10 ft to function as a repeater. This will ensure that your lock has a reliable connection to the hub, and will save on battery drain.
Additionally, install door sensors on the doors with the connected locks so that you know that doors are CLOSED and locked.