Get the waitlistable Programmes List. 

This is an authenticated listing of all active Programmes that are allowed to have a waitlist. 

Each Programme is represented by a TProg. The collection of Programmes is represented by a List of TProg. 

A token is passed for authentication. If the authentication fails, or other errors occur, no programmes are returned. The result of the authentication is represented by a TAuthenticate object. 

Requires a valid registration key entry for the Short Courses feature. 

This function has security level "Unrestricted", and can be accessed by any authenticated user.

[WebMethod(Description = "Gets a list of all waitlistable programmes")]
public TAuthProgList GetWaitlistProgrammes(string token);