Kill someone
        Required arguments:
        * nick - Nick to kill.
        Optional arguments:
        * reason='' - Reason for killing them.

def kill(self, nick, reason=''):
        """
        Kill someone
        Required arguments:
        * nick - Nick to kill.
        Optional arguments:
        * reason='' - Reason for killing them.
        """
        with self.lock:
            self.send('KILL ' + nick + ' :' + reason, error_check=True)