docs: def POST(self, rest_path_list, **kwargs):
          """Send a POST request with optional streaming multipart encoding. See
          requests.sessions.request for optional parameters. To post regular data, pass a
          string, iterator or generator as the ``data`` argument. To post a multipart
          stream, pass a dictionary of multipart elements as the ``fields`` argument.
          E.g.:
  
          fields = {
            'field0': 'value',
            'field1': 'value',
            'field2': ('filename.xml', open('file.xml', 'rb'), 'application/xml')
          }
  
          :returns: Response object
  
          """
          fields = kwargs.pop("fields", None)
          if fields is not None:
              return self._send_mmp_stream("POST", rest_path_list, fields, **kwargs)
          else:
              return self._request("POST", rest_path_list, **kwargs)