Changes to Check domain availability

added the optional property code to the response with the 401 status

added the optional property code to the response with the 403 status

added the optional property code to the response with the 422 status

added the optional property request_id to the response with the 401 status

added the optional property request_id to the response with the 403 status

added the optional property request_id to the response with the 422 status

endpoint added