Trigger a purchase of a product (for testing)

This endpoint allows you to trigger a purchase of a product on Depop. This is useful if you want to test the purchase flow. The product will be sold to a test user and the purchase will be visible in your orders. You will also receive a webhook for the purchase. This endpoint is only available in the staging environment. Deprecated: Use /api/v1/products/by-sku/{sku}/purchase/ instead.