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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def Handle(self, unused_args, token=None):
 """Fetches and renders current user's settings."""


    result = ApiGrrUser(username=token.username)

    if data_store.RelationalDBEnabled():
      user_record = data_store.REL_DB.ReadGRRUser(token.username)
      result.InitFromDatabaseObject(user_record)
    else:
      try:
        user_record = aff4.FACTORY.Open(
            aff4.ROOT_URN.Add("users").Add(token.username),
            aff4_users.GRRUser,
            token=token)

        result.InitFromAff4Object(user_record)
      except IOError:
        result.settings = aff4_users.GRRUser.SchemaCls.GUI_SETTINGS()

    result.interface_traits = (
        self.interface_traits or ApiGrrUserInterfaceTraits())

    return result