Kopia server refresh / status commands ? how to

Often times I make changes to the repo and wish to refresh it instead of restarting it to apply changes without breaking existing backups.

I have not been successful yet and wonder if anyone out there has? The commands seem to require the use of --server-control-username --server-control-password. I think I have accomplished setting those but have yet to be successful getting either a kopia server refresh or kopia server status to reply with anything except error 400 / 403

I have succeeded at getting the status of a repo, but not the server and certainly not a server refresh.

What sayeth the group? Anyone out there able to supply the 1,2,3 on both sides of this