code: def list_assets(self):
          
          response = self.requests_session.get(self._base_url).content
          if not response:
              return {}
  
          try:
              asset_list = json.loads(response)
          except TypeError:
              asset_list = None
          except ValueError:
              raise ValueError(response.decode('UTF-8'))
  
          if not asset_list:
              return []
  
          if 'ids' in asset_list:
              return asset_list['ids']
          return []
docs: List all the assets registered in the aquarius instance.
  
          :return: List of DID string