public boolean login(String actEmail, String actPassword){
        String sql = "SELECT Email AND Password FROM volontari WHERE Email = ? AND Password = ?";
        ResultSet res = null;


        try (Connection conn = connector.getConnection();
             PreparedStatement stmt = conn.prepareStatement(sql)) {

            stmt.setString(1, actEmail);
            stmt.setString(2, actPassword);
            stmt.executeQuery();

            if (res == null){
                return true;
            }else
            return false;


        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        }
         finally {
            try {
                if (res != null) res.close();
            } catch (SQLException e) {
                System.out.println(e.getMessage());
            }
        }return false;
    }