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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 add_members(self, group_jid, peer_jids: Union[str, List[str]]):
 """ Adds multiple users to a specific group at once :param group_jid: The group into which to join the users :param peer_jids: a list (or a single string) of JIDs to add to the group """

        log.info("[+] Adding some members to the group {}".format(group_jid))
        return self._send_xmpp_element(group_adminship.AddMembersRequest(group_jid, peer_jids))