To setup Steam Authentication in steam-user, We have several option like non-steam-guard, steam-guard and totp (and possible more case?) I have few question about: 1. Steam Guard store sentry file, but does it have expiration date? 2. TOTP have certain two way, which one is generate and other is use loginKey. What equivalence information as in SteamKit or in Steam, how they named different methodology? Sorry for that simple question, some high level security issue is best to discuss as easier to encourage open and trust in internet.