I'm trying to integrate an existing schema into a custom provider but the MembershipUser object only seems to have ProviderKey, an object, based on a uniqueIdentifier.
How can I store my existing set of ID's for my users in this object as well and pull them from the DB when I get user information?
I need the legacy key to access all my old data; it's not feasible to switch the system to the ProviderKey (UserId uniqueidentifier).