Instock Sites API
Each Instock site (or just site) represents a single instance of Instock ASRS. Such instance can represent either physical installation of ASRS or a simulation in sandbox environment. Organization may own many sites. A single physical site may have many sandboxes and each sandbox will be characterized by its own `site_id`. **Note**: `site_id` is required to perform operations with orders, ordertasks, inventory and moves.