post https://www.holidu.com/api/external/details
Retrieve detailed static information for specified offers. The "extras" parameter allows for the inclusion of additional data points to the response. The response includes an RFC 6570-compatible "urlTemplate" for generating detail page links with check-in and check-out dates. If some requested offers cannot be retrieved, these will be reported in the "errors" array, with the corresponding property identifier, error code, and descriptive message.