app.service('UserService', ['Users', function(Users) {
    this.getCurrent = function() {
        if (!this.hasOwnProperty('currentUser')) {
            this.currentUser = Users.current();
        }

        return this.currentUser;
    };

    this.setCurrent = function(user) {
        this.me = user;
    };

    this.updateCurrent = function() {
        this.currentUser = Users.current();
    };

    this.logout = function(callback) {
        return Users.logout(callback);
    };
}]);