added no users check

source/bot.py

@@ -182,7 +182,6 @@ def send_users(message):
         None: None
 
     """
-    users = session.query(User).all()
     user_id = message.from_user.id
 
     # Check if user is admin
@@ -190,6 +189,11 @@ def send_users(message):
         bot.reply_to(message, "Error: Admin rights are required to see all users.")
         return
 
+    users = session.query(User).all()
+    
+    if len(users) == 0:
+        bot.reply_to(message, "No users registered.")
+
     for user in users:
         user_info = (f"Telegram ID: {user.telegram_id}\n"
                         f"Username: {user.username}\n"