Get the Attendance Type List. 

This is an authenticated listing of all Attendance Types. 

Each Attendance Type is represented by a TAtty. The collection of Attendance Types is represented by a List of TAtty. 

This list contains all attendance types including inactive ones. To see if an attendance type is inactive, look at the Active property. Active = 0 means it's active, Active = 1 means it's inactive. 

A token is passed for authentication. If the authentication fails, or other errors occur, no Attendance Types 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 attendence types")]
public TAuthAttyList GetAttendanceTypes(string sToken);