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Marks an available item (artwork) as sold to a customer.
IMPORTANT! THIS IS A POST CALL ONLY: marksold
https://api.artlookonline.com/marksold?tenant_id=1&api_code=Abcde567&id=1000&email=customer@customer.com&name=A. Customer&address=1 A Street, Anytown, Etc
&id=36
&email=customer@customer.com
&name=A. Customer
&address=1 A Street, Anytown, Etc
Success (200) | Item was already sold (412) | Item not found (404) | Not authorised (401)