System.out.println("SISTEM LOGIN");
    System.out.println("INSERIRE NOMEUTENTE");
    Scanner scan= new Scanner(System.in);
    String user= scan.nextLine();
    System.out.println("INSERIRE PASSWORD");
    String pass= scan.nextLine();

    try {
        boolean log = true;
        while(log) {
        //conn db
        Connection c = DriverManager.getConnection(url,usr,pswd);
        //creaz statement
        Statement ss = c.createStatement();
        //creaz codice sql
        String sql = " SELECT * FROM users WHERE user'" + user + "' && password='" + pass+ "' ";
        ResultSet res = ss.executeQuery(sql);
        if(res!=null) {
            System.out.println("LOGIN");
            log = false;
        }
        else System.out.println("LOGIN FAILE");
        }
    }