code: def connect_params_async(self):
          
          kwargs = self.connect_params.copy()
          kwargs.update({
              'minsize': self.min_connections,
              'maxsize': self.max_connections,
              'enable_json': self._enable_json,
              'enable_hstore': self._enable_hstore,
          })
          return kwargs
docs: Connection parameters for `aiopg.Connection`