Completes the checkout by marking the order as complete.
Please be aware; Once a checkout is marked as complete it is considered a completed order, the Cart and Checkout endpoints will no longer access a completed order, and a new cart will need to be created.
If you want to access a completed order you will need to use the Account / Orders or Order Status endpoints.
Order token to authorize Cart and Checkout requests.
Specify the related resources you would like to receive in the response body. More Information.
200 Success - Returns the cart object.
The Cart provides a central place to collect information about an order, including line items, adjustments, payments, addresses, and shipments. Read more in Spree docs