Book screens

Book a quote with a creative. Spending limits are enforced. Depending on the account's approval rules the booking is paid at once with the saved card, returns a payment_url for the account holder, or waits for the account holder (the advertiser whose account this is, never the venue) to approve it by email (status awaiting_approval). Once paid, the booking is scheduled at once: venues take no part in booking and can only report an advert already showing on their screen. Some categories (alcohol, gambling, political, cannabis, tobacco_and_vaping, dating) are checked by Wall Marketing staff first. Read next_step in the result. Repeating the call with the same idempotency key never books twice. Needs scope book. Send the idempotency key as the Idempotency-Key header.