diff --git a/main.go b/main.go
index fd8ee90..21da633 100644
--- a/main.go
+++ b/main.go
@@ -42,7 +42,8 @@ func handleForm(w http.ResponseWriter, r *http.Request) {
 	}
 
 	now := time.Now().UTC().Format(time.RFC3339)
-	entry := strings.Join([]string{now, "unknown", details.Label, details.Url}, ",")
+	username := r.Header.Get("X-Forwarded-Preferred-Username")
+	entry := strings.Join([]string{now, username, details.Label, details.Url}, ",")
 	insertEntry(entry)
 
 	tmpl.Execute(w, struct{ Success bool }{true})