AddAttendee (Sell Ticket) is a combination of 3 mandate API Calls.
Block Tickets – Blocking the tickets before purchasing, This API will give blocked ticket ID’s
https://documenter.getpostman.com/view/3997053/RVu8i7Xw
Sell Tickets – Based on Blocked Ticket ID’s we need to fill Attendee.
https://documenter.getpostman.com/view/3997053/RVu8i7Xx
Payment Update – Need to Update the payment information for the Ticket ids.