{
    "users": [
        {
            "login": "admin",
            "password": "password",
            "role": "admin"
        }
    ]
}

var User = Backbone.Model.extend({
    defaults: {
        login: "",
        password: "",
        role: ""
    },
    // haven't thought about this function yet
    isAdmin: function () {
        if this.get({role: "admin}) {
            return this;
        }
    }
});