Once creating a ASP.NET MVC5 project (with target framework is .NET 4.5.1 and the authentication type is Individual User Account
You can implement it yourself. It's not impossible. Someone has done it here and here. Things might have changed a bit.
I've implemented my AspNet.Identity for nhibernate and I don't have any reference to entity framework. Cannot show you the code but I've basically followed what some others have done with RavenDb, Dapper or nHibernate.
You have to implement your: