Get the Courses List. 

This is an authenticated listing of all Courses. 

Each Course is represented by a TQual. The collection of Courses is represented by a List of TQual. 

A Course refers to training which is not linked to a training package. 

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

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

[WebMethod(Description = "Gets a list of all courses")]
public TAuthQualList GetCourses(string sToken);