Register IAuthenticationManager with Unity

Try adding below line in the class UnityConfig:

container.RegisterType<IAuthenticationManager>(
    new InjectionFactory(
        o => System.Web.HttpContext.Current.GetOwinContext().Authentication
    )
);

Here is what I did to make Unity play nice with ASP.NET Identity 2.0:

I added the following to the RegisterTypes method in the UnityConfig class:

container.RegisterType<DbContext, ApplicationDbContext>(
    new HierarchicalLifetimeManager());
container.RegisterType<UserManager<ApplicationUser>>(
    new HierarchicalLifetimeManager());
container.RegisterType<IUserStore<ApplicationUser>, UserStore<ApplicationUser>>(
    new HierarchicalLifetimeManager());

container.RegisterType<AccountController>(
    new InjectionConstructor());

This will also work as a complete configuration to allow the use of Unity with Identity 2.0:

container.RegisterType<MyDbContext>(new PerRequestLifetimeManager(), new InjectionConstructor());

// Identity
container.RegisterType<UserManager<User>>(new HierarchicalLifetimeManager());
container.RegisterType<SignInManager<User, string>>(new HierarchicalLifetimeManager());
container.RegisterType<IUserStore<User>, UserStore<User>>(new PerRequestLifetimeManager(), new InjectionFactory(x => new UserStore<User>(GetConfiguredContainer().Resolve<MyDbContext>())));
container.RegisterType<IAuthenticationManager>(new InjectionFactory(x => HttpContext.Current.GetOwinContext().Authentication));

With this setting, you won't need to register the AccountController or ManageController types with Unity.

If you really want to use Unity to manage all your dependencies, you could try to register also the IAuthenticationManager in Unity

    container.RegisterType<IAuthenticationManager>(
        new InjectionFactory(c => HttpContext.Current.GetOwinContext().Authentication));

With some small adaptations, you can then use Unity to resolve all needed dependencies for Asp.net Identity.

I found a great post on this (also tested by me) here:

http://tech.trailmax.info/2014/09/aspnet-identity-and-ioc-container-registration/