code: def _configure_manager(self):
          
          self._manager = CloudDatabaseManager(self,
                  resource_class=CloudDatabaseInstance, response_key="instance",
                  uri_base="instances")
          self._flavor_manager = BaseManager(self,
                  resource_class=CloudDatabaseFlavor, response_key="flavor",
                  uri_base="flavors")
          self._backup_manager = CloudDatabaseBackupManager(self,
                  resource_class=CloudDatabaseBackup, response_key="backup",
                  uri_base="backups")
docs: Creates a manager to handle the instances, and another
          to handle flavors.