var SteamUser = require('steam-user');
var SteamTotp = require('steam-totp');
var user = new SteamUser();

user.logOn({
    accountName: "EnterAccountName",
    password: "EnterPassword",
    oneFactorCode: SteamTotp.getAuthCode("")
});

user.on('webSession', function() {
    console.log('Logged in!');
    user.setPersona(SteamUser.Steam.EPersonaState.Offline) // Set to offline or online - your choice.
    user.gamesPlayed([10]); // Enter ID of the steam game. Found in the store link (/app/10) is Counter-Strike

});