app.post('/usersacces/add', function (req,res) {
    var response = [];

    if (typeof req.body.alias!== 'undefined' &&typeof req.body.nom!== 'undefined'   ) {
        var alias = req.body.alias, nom = req.body.nom;

        connection.query('INSERT INTO administration_users_niveaux_acces (alias, nom) VALUES (?, ?)',
            [alias, nom],
            function(err, result) {
                if (!err){

                    if (result.affectedRows != 0) {
                        response.push({'result' : 'success'});

                    } else {
                        response.push({'msg' : 'No Result Found'});
                    }
          // When a client connects, we note it in the console
          io.sockets.on('connection', function (socket) {
              socket.emit('message', 'You are connected!');
              console.log('message '+ 'You are connected!');
          });
                    res.setHeader('Content-Type', 'application/json');
                    res.status(200).send(JSON.stringify(response));
                } else {
                    res.status(400).send(err);
                }
            });

    } else {
        response.push({'result' : 'error', 'msg' : 'Please fill required details'});
        res.setHeader('Content-Type', 'application/json');
        res.status(200).send(JSON.stringify(response));
    }
 });

socket.on('message', function(message) {
          var databa = [];
          $.ajax({
                  url: '/usersacces'
              })
              .done(function(data) {
                  for (var i = 0, len = data[0].items.length; i < len; i++) {
                      var e1 = data[0].items[i].id;
                      databa.push(e1);
                  }
                  myChart.data.datasets[0].data = databa;
                          myChart.update();
              }).always(function() {
                  console.log(1);

              });

        console.log('The server has a message for you: ' + message);
    });