code: def account_id(self, value):
          
          if value == self._defaults['ai.user.accountId'] and 'ai.user.accountId' in self._values:
              del self._values['ai.user.accountId']
          else:
              self._values['ai.user.accountId'] = value
docs: The account_id property.
          
          Args:
              value (string). the property value.