nixos/greetd: fix minor typo for default user

It has been like this since the module was added, but it hasn't caused
problems because greetd assumes a default user of "greeter"[1] when it
isn't found anyway

[1]: https://git.sr.ht/~kennylevinsen/greetd/tree/d70030962341a3ae7a88ecf2f7af748a5a6296d1/item/greetd/src/config/mod.rs#L127

1 files changed, 1 insertions, 1 deletions

diff --git a/nixos/modules/services/display-managers/greetd.nix b/nixos/modules/services/display-managers/greetd.nix
index 895961707d363..4fc6ca3674915 100644
--- a/nixos/modules/services/display-managers/greetd.nix
+++ b/nixos/modules/services/display-managers/greetd.nix
@@ -54,7 +54,7 @@ in
   config = mkIf cfg.enable {
 
     services.greetd.settings.terminal.vt = mkDefault cfg.vt;
-    services.greetd.settings.default_session = mkDefault "greeter";
+    services.greetd.settings.default_session.user = mkDefault "greeter";
 
     security.pam.services.greetd = {
       allowNullPassword = true;