I am afraid that a clock is not possible. As I can remember some of the officials here mentioned that there is no hardware clock on the board.
But at least a lock password would make sense because without the lock function is for nothing.
I have learned that A&H, as other companies in the market, do not commit upcoming features early. There is no public roadmap maybe because the customers will judge them on the fullfillment of such a roadmap, even a roadmap will help customers to decide wether they will go the way with that product or not. At the moment you only can decide on the current features because probably no additional feature you need will be available in the future. From my point of view it is not clever but it is as it is.
So, at the moment you have to live without user management which maybe will never be available.