From 95d46dd02aa19ca95745ea05b5f1548943b976d3 Mon Sep 17 00:00:00 2001
From: mohammadreza <mohammadrezaashrafian2@gmail.com>
Date: Wed, 24 Jun 2026 13:17:40 +0330
Subject: [PATCH] refactor: improve user list formatting in UserManager.java

---
 src/main/java/com/university/chat/Server/UserManager.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/com/university/chat/Server/UserManager.java b/src/main/java/com/university/chat/Server/UserManager.java
index 07cbc2d..5ab7ec7 100644
--- a/src/main/java/com/university/chat/Server/UserManager.java
+++ b/src/main/java/com/university/chat/Server/UserManager.java
@@ -19,7 +19,7 @@ public class UserManager {
     }
 
     public String listUsers() {
-        return users.keySet().toString();
+        return String.join(",", users.keySet());
     }
 
     public Iterable<ClientSession> getAllSessions() {