Return the config with the given case-insensitive config_name.
        Raise LookupError if no config exists with this name.

def get_config(self, config_name, require_ready=True):
        """
        Return the config with the given case-insensitive config_name.
        Raise LookupError if no config exists with this name.
        """
        if require_ready:
            self.bots.check_configs_ready()
        else:
            self.bots.check_bots_ready()

        return self.configs.get(config_name.lower(), {})