Public keys can be secret too if you don't tell anyone about them

morph/grid/local/users.nix → morph/grid/local/secrets/users.nix

 let key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHx7wJQNqKn8jOC4AxySRL2UxidNp7uIK9ad3pMb1ifF flo@fs-la";
-in { "root" = key; "flo" = key; "vagrant" = key; }
+in { "root" = key; "vagrant" = key; }

morph/grid/production/users.nix

-let key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGN4VQm3BIQKEFTw6aPrEwNuShf640N+Py2LOKznFCRT exarkun@bottom";
-in { "root" = key; jcalderone = key; }

morph/grid/testing/users.nix

-let key = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGN4VQm3BIQKEFTw6aPrEwNuShf640N+Py2LOKznFCRT exarkun@bottom";
-in { "root" = key; jcalderone = key; }