def fulfill(order_id, shipping_address, line_items, options = {})
      commit :fulfillment, build_fulfillment_request(order_id, shipping_address, line_items, options)
    end
def fulfill(order_id, shipping_address, line_items, options = {})
      commit :fulfillment, build_fulfillment_request(order_id, shipping_address, line_items, options)
    end
Pass in the login and password for the shipwire account.
 Optionally pass in the :test => true to force test mode