public DeltaShoutsHtml AddShout(string message, string toUsername, int chatID, int lastReceivedShoutID)
{
DemandUserAuthentication();
Shout.AddShout(KickUserProfile, HostProfile.HostID, message, toUsername, ToNullable(chatID));
return(GetDeltaShouts(toUsername, chatID, lastReceivedShoutID));
}