Coft: Create Order

Step 2 of the Redirect card-on-file (COFT) flow.
There is no separate API for this step. Use Create Order under the Redirect
category (POST /api/checkout/v1/orders) and select the
Coft: Create Order example / CoftOrderRequest schema from the request body dropdown.

Pass the customer_id created in step 1. The response contains the hosted checkout page URL;
redirect the shopper to it. On that page the shopper can tick Save card, which saves the
card and creates a token against the customer for future orders. No separate payment call is needed.