docs: def post(self, url, postParameters=None, urlParameters=None):
          """
          Convenience method for requesting to google with proper cookies/params.
          """
          if not self.access_token:
              raise IOError("No authorized client available.")
          if not self.action_token:
              raise IOError("Need to generate action token.")
          if urlParameters is None:
              urlParameters = {}
          headers = {'Authorization': 'Bearer ' + self.access_token,
                     'Content-Type': 'application/x-www-form-urlencoded'}
          postParameters.update({'T':self.action_token})
          request = requests.post(url + '?' + self.getParameters(urlParameters),
                                  data=postParameters, headers=headers)
          if request.status_code != 200:
              return None
          else:
              return toUnicode(request.text)