def subscribe(self, peer_jid):
        """
        Asks for subscription

        Args:
          peer_jid (str): the JID you ask for subscriptiion

        """
        self.roster.subscribe(aioxmpp.JID.fromstr(peer_jid).bare())
Asks for subscription

        Args:
          peer_jid (str): the JID you ask for subscriptiion