Use pre-existing setup user if existent

scripts/lib/action.fish

@@ -55,15 +55,19 @@ function runSetupUserAction -V dir
                 set -l sudoConfig "/etc/sudoers.d/PortValhalla"
 
                 begin
-                    echo "Creating setup user"
-
-                    and useradd \
-                        --comment "PortValhalla Setup User" \
-                        --system \
-                        --groups nix-users \
-                        --create-home \
-                        --uid (getOSConfig setupUser.id --json) \
-                        "$name"
+                    if id -u "$name" &>/dev/null
+                        echo "Setup user already exists!"
+                    else
+                        echo "Creating setup user"
+    
+                        and useradd \
+                            --comment "PortValhalla Setup User" \
+                            --system \
+                            --groups nix-users \
+                            --create-home \
+                            --uid (getOSConfig setupUser.id --json) \
+                            "$name"
+                    end
 
                     and begin
                         echo "$name ALL=(ALL:ALL) NOPASSWD: ALL"