code: def _find_passwords(self, service, username, deleting=False):
          
          passwords = []
  
          service = self._safe_string(service)
          username = self._safe_string(username)
          for attrs_tuple in (('username', 'service'), ('user', 'domain')):
              attrs = GnomeKeyring.Attribute.list_new()
              GnomeKeyring.Attribute.list_append_string(
                  attrs, attrs_tuple[0], username)
              GnomeKeyring.Attribute.list_append_string(
                  attrs, attrs_tuple[1], service)
              result, items = GnomeKeyring.find_items_sync(
                  GnomeKeyring.ItemType.NETWORK_PASSWORD, attrs)
              if result == GnomeKeyring.Result.OK:
                  passwords += items
              elif deleting:
                  if result == GnomeKeyring.Result.CANCELLED:
                      raise PasswordDeleteError("Cancelled by user")
                  elif result != GnomeKeyring.Result.NO_MATCH:
                      raise PasswordDeleteError(result.value_name)
          return passwords
docs: Get password of the username for the service