code: async def on_raw_401(self, message):
          
          nickname = message.params[1]
  
          # Remove nickname from whois requests if it involves one of ours.
          if nickname in self._pending['whois']:
              future = self._pending['whois'].pop(nickname)
              future.set_result(None)
              del self._whois_info[nickname]
docs: No such nick/channel.