/**
* @brief Sign In to NetmarbleS service.<br>
* After signing in, game token can be used to authenticate the player in game server.
*
* @param callback Callback to deal with a reponse to the request.
* @see SignInDelegate
*/
public void SignIn(SignInDelegate callback)
{
Log.Debug("[Session] SignIn");
SessionImpl.SignIn(callback);
}
