ValidationRequestResult param should be optional

[Beans0063]

Per the docs method signature should be: ValidationRequestResult AddOutgoingCallerId (phoneNumber, friendlyName, callDelay)

From OutgoingCallerIds.cs there is a required fourth param:

public ValidationRequestResult AddOutgoingCallerId(string phoneNumber, string friendlyName, int? callDelay, string extension)

Please make extension optional to preserve compatibility.

[devinrader]

In this case the user can just specify an empty string. C# does not have the notion of optional parameters.