Get the Positions List. 

This is an authenticated listing of all Positions. 

Each Position is represented by a TPosition. The collection of Positions is represented by a List of TPosition. 

A Position refers to a position in a company and is used in client employment. 

A token is passed for authentication. If the authentication fails, or other errors occur, no positions 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 positions")]
public TAuthPositionList GetPositions(string token);