From 1d76b529deb61bc3675b35a6c538094245ee408f Mon Sep 17 00:00:00 2001
From: vivekmaru36 <110764790+vivekmaru36@users.noreply.github.com>
Date: Sun, 31 Dec 2023 22:17:06 +0530
Subject: [PATCH] Implement user addition in UserService online_chat.py

---
 .../object_oriented_design/online_chat/online_chat.py     | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/solutions/object_oriented_design/online_chat/online_chat.py b/solutions/object_oriented_design/online_chat/online_chat.py
index 7063ca0..ae46948 100644
--- a/solutions/object_oriented_design/online_chat/online_chat.py
+++ b/solutions/object_oriented_design/online_chat/online_chat.py
@@ -8,7 +8,13 @@ class UserService(object):
         self.users_by_id = {}  # key: user id, value: User
 
     def add_user(self, user_id, name, pass_hash):
-        pass
+        if user_id not in self.users_by_id:
+            new_user = User(user_id, name, pass_hash)
+            self.users_by_id[user_id] = new_user
+            return new_user
+        else:
+            # User with this ID already exists
+            return None
 
     def remove_user(self, user_id):
         pass