atuin: use DynamicUser

agenix/hosts/sail/config.nix

@@ -72,8 +72,6 @@
 
     atuin-environment = {
       file = ./atuin/environment.age;
-      owner = "atuin";
-      group = "atuin";
     };
 
     freshrss-user-password = {
@@ -117,7 +115,6 @@
 
     anonymous-overflow-config = {
       file = ./anonymous-overflow/config.age;
-      #mode = "444";
     };
 
     anonymous-overflow-auth = {

system/nixos/atuin-sync.nix

@@ -1,13 +1,6 @@
 { pkgs, config, ... }:
 
 {
-  users.users.atuin = {
-    group = "atuin";
-    isSystemUser = true;
-  };
-
-  users.groups.atuin = { };
-
   systemd.services.atuin-sync = {
     description = "atuin sync server";
 
@@ -19,8 +12,7 @@
       ExecStart = "${pkgs.atuin}/bin/atuin server start";
       EnvironmentFile = [ config.age.secrets.atuin-environment.path ];
       Restart = "on-failure";
-      User = "atuin";
-      Group = "atuin";
+      DynamicUser = true;
       RuntimeDirectory = "atuin";
       RuntimeDirectoryMode = "0700";
     };