API - v2 - Order completion

Hi,

When using Wix restaurant dashboard, you can mark an order as complete.
I need to perform the same action with the API v2.

I have tried the following, which does not work (call performed within wix backend code function, with correct authentication headers ; org_id ad order_id are replaced by actuel values):

https://api.wixrestaurants.com/v2/organizations/org_id/orders/order_id/deliver?as=restaurant

Any hint?

Thanks
Jérôme