Untitled

@app.on_chat_member()
def track_users(client, message):
    if message.new_chat_members:
        for member in message.new_chat_members:
            user_data = {
                "user_id": member.id,
                "chat_id": message.chat.id
            }
            users_collection.update_one({"user_id": member.id}, {"$set": user_data}, upsert=True)