Converts the quotes in the cart to policies. All the parameters (payment method, promo codes, etc) are set in the cart. This endpoint simply allows you to finalize the purchase of the cart and convert quotes to policies. Upon purchase, the policy declaration document is generated async, in which you can use the webhook property in the POST /quote endpoint to be notified once the document is ready.

PURCHASING - For Payroll, submit with an empty body. For Credit Card, the body must contain the stripeToken.