SecurityLayer

The SecurityLayer is a BotLayer that does one and only one thing; it inspects each incoming Update, determines the originating user id, and updates the Context to reflect the appropriate User / IUser.

This allows the rest of the Telefrag framework to home off the User property of Context; tying Context to the user invoking the action, and allowing security on items such as Commands, Callbacks, Menus, etc. to occur seamlessly and without explicit boilerplate or ceremony.