Validation of AtClientPreference properties when set

[Zambrella]

Is your feature request related to a problem? Please describe.

When creating an app I forgot to set the namespace property of the AtClientPreference object and I didn't realise this was an issue until trying to subscribe to notifications from the server. I then set it to an invalid namespace (one that had - in it) and again wasn't aware this was a problem until much later in the "flow".

Describe the solution you'd like

When constructing an AtClientPreference object and settings properties it would be helpful if they could be validated when they're set to make sure they're correct. It might be helpful to use a constructor to indicate which fields are required and if any are optional, what their default values are.

Describe alternatives you've considered

No response

Additional context

No response