Currently, we don't have a member registration and login feature yet.
In the meantime, we recommend Caspio to create your membership service.
Caspio offers a 14 day trial period. For additional pricing information, you can visit this page: http://www.caspio.com/pricing.
Alternatively, you can password protect pages using our Password Protection feature, which allows you to create a private website, or make part of your site private, by password protecting certain pages on your site. Take a look at the Password Protection tutorial to get started: Adding Password Protection.