Register/ Login/ Membership module in Orchard - orchardcms

Question

I can't figure out how to add Register/Login functionality to a site in Orchard. Is there a Membership module or some configuration I need to enable?
EDIT: What I had in mind were modules along the lines of these that extend the existing User model with registration/profile functionality:
Extended Registration module: http://extendedregistration.codeplex.com/
Orchard Profile module: http://orchardprofile.codeplex.com/

Answer 1

It's under settings/users in the admin ui.

Answer 2

In the Dashboard scroll down to Settings and select Users.
Make sure "Users can create new accounts on the site" is checked and click "Save".
Once this is done log out.
Then click log in, and bellow your username and password field there will be a small text with a blue link to Register.
You don't actually need the extended registration and profile for this. Those are for adding additional information to the registration form.
This can also be done programmatically:
var registrationSettings = _services.WorkContext.CurrentSite.As<RegistrationSettingsPart>();
registrationSettings.UsersCanRegister = true;
However this will not work if you're doing it from Migrations because you won't be able to use WorkContext.
For migrations you can use IRepository for RegistrationSettingsPartRecord:
RegistrationSettingsPartRecord currentSetting = _registrationSettingRepository.Table.First();
currentSetting.UsersCanRegister = true;
_registrationSettingRepository.Update(currentSetting);
However this will no longer work as of Orchard version 1.8 as the record no longer exists. As of 1.8 one way I know of would be using ISiteService:
var site = _siteService.GetSiteSettings();
var regsettings = site.As<RegistrationSettingsPart>();
regsettings.UsersCanRegister = true;