My stock dosen't change when I create an order with Api

[Anonymous]

Hello,

I am developing a tool that communicates with API (Prestashop API) using Python. When I try to create an order with a product, everything seems to work fine, but the quantity of the product does not change. I have tried everything, but nothing seems to work.

Details:
Order creation successful with the specified product Stock remains the same

As a trial account, am I able to modify stock through the API? Is there anything wrong with my code?

order_find = shopify.Order.find()
print(order_find)
if len(order_find) >= 1:
    for ord in order_find:
        if ord.source_identifier == order['increment_id']:
            print('La commande est déjà existante')
            break
        else:
            print('La commande vient d\'etre créer')
            response = orderS.save()
            print(response)
else:
    print('La commande vient d\'etre créer')
    response = orderS.save()
    print(response) 

Thank you