Set the DC Creator literal value

        :param value: Value of the creator node
        :param lang: Language in which the value is

def set_creator(self, value: Union[Literal, Identifier, str], lang: str= None):
        """ Set the DC Creator literal value

        :param value: Value of the creator node
        :param lang: Language in which the value is
        """
        self.metadata.add(key=DC.creator, value=value, lang=lang)