Дмитрий Дудин

// User
App.Models.User = Backbone.Model.extend({
  urlRoot: 'https://jsonplaceholder.typicode.com/users/',
  checkAuth: function () {
    var options = {
      success: function (mod, res) {
        console.log('Успешно');
        console.log(res.name);
      },
      error: function (mod, res) {
        console.log('Не успешно');
      }
    }

    this.fetch(options);
  }
});

var userID = 1;

var user = new App.Models.User({
  id: userID
});

user.checkAuth();

num.destroy({
    success: function(model, response) {...},
    error: function(err) {...}
});