docs: def _list_clouds(self):
          """
          Request a list of all added clouds.
  
          Populates self._clouds dict with mist.client.model.Cloud instances
          """
          req = self.request(self.uri + '/clouds')
          clouds = req.get().json()
          if clouds:
              for cloud in clouds:
                  self._clouds[cloud['id']] = Cloud(cloud, self)
          else:
              self._clouds = {}