this.joinChannel(this.server.getChannelAdministration().FOYERNAME);
    public final void loginUser(String name, String password) {        UserAdministration tmpUserAdministration = this.userAdministration;        if (tmpUserAdministration != null) {            User tmpUser = tmpUserAdministration.loginUser(name, password);            //User mit diesen Daten nicht vorhanden,LoginErrorCommand senden,setUser(null)            if (tmpUser == null) {                this.sendCommand(                    new Util.Commands.LoginErrorCommand());                this.setUser(null);            }           /*User vorhanden, Foyer betreten und Client informieren, evtl. zum            * AdminClientServant werden            */            else {                this.setUser(tmpUser);                this.joinChannel(this.server.getChannelAdministration().FOYERNAME);                this.sendCurrentUserData();                if (tmpUser.isAdmin()) {                    this.becomeAdminClientServant();                }            }        }    }