function etsis_clear_auth_cookie()
{

    $app = \Liten\Liten::getInstance();

    /**
     * Fires just before the authentication cookies are cleared.
     *
     * @since 6.2.0
     */
    $app->hook->do_action('clear_auth_cookie');

    $vars1 = [];
    parse_str($app->cookies->get('ETSIS_COOKIENAME'), $vars1);
    /**
     * Checks to see if the cookie is exists on the server.
     * It it exists, we need to delete it.
     */
    $file1 = $app->config('cookies.savepath') . 'cookies.' . $vars1['data'];
    try {
        if (etsis_file_exists($file1)) {
            unlink($file1);
        }
    } catch (NotFoundException $e) {
        Cascade::getLogger('error')->error(sprintf('FILESTATE[%s]: File not found: %s', $e->getCode(), $e->getMessage()));
    }

    $vars2 = [];
    parse_str($app->cookies->get('SWITCH_USERBACK'), $vars2);
    /**
     * Checks to see if the cookie exists on the server.
     * It it exists, we need to delete it.
     */
    $file2 = $app->config('cookies.savepath') . 'cookies.' . $vars2['data'];
    if (etsis_file_exists($file2, false)) {
        @unlink($file2);
    }

    /**
     * After the cookie is removed from the server,
     * we know need to remove it from the browser and
     * redirect the user to the login page.
     */
    $app->cookies->remove('ETSIS_COOKIENAME');
    $app->cookies->remove('SWITCH_USERBACK');
}