gistfile1.js

// User model
//--------------------

models.User = Backbone.Model.extend({

        defaults: {
                id: 0
            ,   username: ''
        }

        // Set url to always be `/login` not `/login/:id`
    ,   url: function() {

            var base  = '/login';
            return base;
        }

        // Set sync method to use POST method
        // in both update and create
    ,   sync: function( method, model, options ) {
            if ( method === "update" ) method = "create";
            return Backbone.sync( method, model, options );
        }

});