Returns a list of voucher codes and the total voucher code count.
A maximum of 1000 voucher codes may be returned by this method.
/voucher/{bundle_id}
This method is only accessible using a Hotelier API account.
[ { "count":INTEGER, // Codes count "id":INTEGER, // Bundle id "voucher_codes": [ "code":STRING, "usages":INTEGER, "locked":BOOLEAN, "active":BOOLEAN, "value":MONEY // Empty if not defined ] } ]