Hello Jean-Marc,
Just a word of caution, it is currently impossible to administer any Nuki locally, Nuki have locked that functionality to the cloud ONLY. So you can’t do anything with Home Assistant other than use actions (lock, open etc, and monitor). All the things you would actually want to automate locally are not supported (set pincode, allow users, add guests, set schedules etc etc etc).
After 4 years, I’m still waiting for that functionality.