private static void listUsers(IAppSys appSys, Scanner scan) {
        try{
            Iterator<IUser> iterator= appSys.getUsers();
            System.out.println(ALLUSERS);
            while(iterator.hasNext()){
                IUser users=iterator.next();
                if(appSys.hasTheme(users)){
                    System.out.println(users.getUsername()+"; "+users.getEmail()+"; "+users.getUserType()+" ("+users.getTheme()+")");
                }else{
                    System.out.println(users.getUsername()+"; "+users.getEmail()+"; "+users.getUserType());
                }
            }
        }catch (NoEditorLoggedInException e){
            System.out.println(NOEDITORLOGGEDIN);
        }
    }