Authenticates with the IRC server.
        NOTE: Method will not raise an exception,
        if the password is wrong. It will just fail..
        Required arguments:
        * password - Password to send.

def _password(self, password):
        """
        Authenticates with the IRC server.
        NOTE: Method will not raise an exception,
        if the password is wrong. It will just fail..
        Required arguments:
        * password - Password to send.
        """
        with self.lock:
            self.send('PASS :%s' % password, error_check=True)