Installer: Clean up RepoIO interface

Change-Id: If80d7be1460c725b7df9d1d27c9354cb9141acfe
diff --git a/core/installer/values-tmpl/headscale-user.cue b/core/installer/values-tmpl/headscale-user.cue
index fb38f8b..893ca28 100644
--- a/core/installer/values-tmpl/headscale-user.cue
+++ b/core/installer/values-tmpl/headscale-user.cue
@@ -22,7 +22,7 @@
 }
 
 helm: {
-	"headscale-user": {
+	"headscale-user-\(input.username)": {
 		chart: charts.headscaleUser
 		values: {
 			username: input.username