better variables

loki.nix

@@ -1,7 +1,4 @@
-{ pkgs, userName, ... }:
-let
-  lokiPort = 3100;
-in
+{ pkgs, lokiUser, lokiPort ? (3100), ... }:
 {
   networking.firewall.allowedTCPPorts = [ lokiPort ];
 
@@ -12,7 +9,7 @@ in
   
   services.loki = {
     enable = true;
-    user = "${userName}";
+    user = "${lokiUser}";
 
     configuration = {
       server.http_listen_port = lokiPort;