code: def _parse_directory(self):
          
          if self._parser.has_option('storage', 'directory'):
              directory = self._parser.get('storage', 'directory')
              # Don't allow CUSTOM_APPS_DIR as a storage directory
              if directory == CUSTOM_APPS_DIR:
                  raise ConfigError("{} cannot be used as a storage directory."
                                    .format(CUSTOM_APPS_DIR))
          else:
              directory = MACKUP_BACKUP_PATH
  
          return str(directory)
docs: Parse the storage directory in the config.
  
          Returns:
              str