code: def subscribe(self, peer_jid):
          
          self.client.enqueue(
              stanza.Presence(type_=structs.PresenceType.SUBSCRIBE,
                              to=peer_jid)
          )
docs: Request presence subscription with the given `peer_jid`.
  
          This is deliberately not a coroutine; we don’t know whether the peer is
          online (usually) and they may defer the confirmation very long, if they
          confirm at all. Use :meth:`on_subscribed` to get notified when a peer
          accepted a subscription request.