Where is the Role and Membership Information Stored?

I have installed Nop in a test environments. Great app and easy to install. Everything works fine but I have a few questions.
(1) Where is the Membership and Roles information stored?
I don't see any reference to aspnet role  and membership DB in the providers.

What I am trying to do is have only one DB. So I  am wondering, does it use ASP.Net membership db etc, if so, can I just  run regSql on the Nop Db and change the connectionStrings.
OR
Is aspNet providers not used at all?
By this I mean, is the ONLY Database needed already included in the Nopcommerce DB?   No reference to Machine Config etc, etc.
cheers,
yousaid

nopCommerce uses custom Membership/Role providers. Look at \Libraries\Nop.BusinessLogic\Profile\StoreMembershipProvider.cs and \Libraries\Nop.BusinessLogic\Profile\StoreRoleProvider.cs files. All required information is stored into a single nopCommerce database