rsync & mirror

This might not be the correct place, ...

Im trying to setup an HA server config . Ive gotten Load balancing working, Galera working. Now I just need to get the user/vhosts sync part working.

I was using freefilesync initially, but will probably use unison.. but my issue is.. I can sync over the users & files, but they don't show up on the second other server cwp console. Dirs & files are there, but nothing in Vhosts or user, or domains.
Am I trying to do something that cannot be done & I`ll need to add users to both servers before syncing just the user home folders? or can It be done, just not how Im doing it?

Ta