Twitch doesn't support WHO/WHOIS,
        so ignore errors from those commands

def on_raw_421(self, message):
        """
        Twitch doesn't support WHO/WHOIS,
        so ignore errors from those commands
        """
        if message.params[1] in {'WHO', 'WHOIS'}:
            LOGGER.debug('Pydle sent WHO/WHOIS which resulted in 421')
        else:
            super().on_raw_421(message)