var userModel = Backbone.Model.extend({
          urlRoot: "http://generals.vm:3000/api/get-user-info",
          defaults:function(){
               return {
                    username:"test",
                    email:"test"
               };
          }
     });
     var user = new userModel();
     user.fetch();
     console.log(user.toJSON()); //--> from here user.username or user.email is equal to test as still
                //--> but instead values return from urlRoot save in user.attributes.username