code: def export_intermediate_certificate(self, filename=None):
          
          result = self.make_request(
              CertificateExportError,
              raw_result=True,
              resource='intermediate_certificate_export')
              
          if filename is not None:
              save_to_file(filename, result.content)
              return
      
          return result.content
docs: Export the intermediate certificate. Returned certificate will be in
          string format. If filename is provided, the certificate will also be
          saved to the file specified.
          
          :raises CertificateExportError: error exporting certificate, can occur
              if no intermediate certificate is available.
          :rtype: str or None