D365 WHS app get current worker user id

Microsoft Dynamics 365 Warehouse Management app

When you want to get the current WHS session worker user id using x++.

#WHSRF

public static WHSUserId getCurrentWHSUserId()
{
    WhsrfPassthrough pass = controller.parmSessionState().parmPass();
    WHSUserId userId;
    if (pass.exists(#UserId))
    {
        userId = pass.lookup(#UserId);
    }
}