code: def _build_url(self, api_call):
          
          if self.api_version in ('1.13.0', '1.13.0+update.1', '1.13.0+update.2'):
              if '/' not in api_call:
                  return "{0}/{1}/index.json".format(self.site_url, api_call)
          return "{0}/{1}.json".format(self.site_url, api_call)
docs: Build request url.
  
          Parameters:
              api_call (str): Base API Call.
  
          Returns:
              Complete url (str).