private function configureDebug()
    {
        if($debug = $this->config['cas_debug'])
        {
            $path = (gettype($debug) == 'string') ? $debug : '';
            phpCAS::setDebug($path);
            // https://github.com/Jasig/phpCAS/commit/bb382f5038f6241c7c577fb55430ad505f1f6e23
            phpCAS::setVerbose(true);
        }
    }