I developed my own super simple lock manager for my Zwave Kwikset locks. Posting the code in case it’s useful to anyone else. I had been using keymaster, which was very functional, but overkill for my needs and created a lot of helpers, scripts and automations which were cluttering my system.
The key difference is that this solution requires only 24 helpers (for 8 lock codes) and 2 automations (with some small modifications to specify your lock entities and notification service).
markaggar/HA_Simple_Lock_Manager: Simple Zwave Lock Manager (github.com)