Telegram Bot Weebhook Not Working?

Question

Python

uid = update.message.from_user.id
AttributeError: 'CallbackContext' object has no attribute 'message'

def start(update: Update, context: CallbackContext):
    # Get user Telegram ID
    uid = str(update.message.from_user.id)
    cid = update.message.chat_id
    # Fimd user in our database
    user = db.getUserByID(int(uid))