Sort of new to ST and the new app (I never had the “old” app which is called Classic now). Through some searching on the forum, it appears there was an add-on to the Classic app called “Smart Locks” that could do things like manage user codes in your locks. I just recently got a Schlage touchscreen deadbolt and added it to the devices for my ST hub.
It doesn’t appear to me that this functionality is built into the new app. I’ve set up for ST to notify me when someone unlocks the lock. And I can unlock and lock the Schlage through the app. But I don’t see that level of detailed control of the lock, like user codes that time out, or user codes that can only be used once, or whatever.