Hi i using this code for login   
function login(err, sessionID, cookies, steamguard) {
	if(err) {
		logger.error('Auth error');
		logger.debug(err);
		if(err.message == "SteamGuardMobile") {
			account.twoFactorCode = SteamTotp.generateAuthCode(account.shared_secret);
			logger.warn('Error in auth: '+account.twoFactorCode);
			setTimeout(function() {
				community.login(account, login);
			}, 5000);
			return;
		}
		process.exit(0);
	}
	logger.trace('Sucesfully auth');
	account.sessionID = sessionID;
	account.cookies = cookies;
	community.getWebApiKey('secrect.com', webApiKey);
	community.startConfirmationChecker(10000, account.identity_secret);
	
}
after 2 ~ 3 days i lost my session, and i use this for new loggin 
community.on('sessionExpired', function(err) {
	if (err) {
		console.log('sessionExpired: '+err);
	}
	community.stopConfirmationChecker();
	community.login(account, login);
	
	console.log('=======New Session=========');
});
How I force to lose my session? for testing my code? It's horrible to have to wait 2 ~ 3 days  Sorry my english...