private IPhotoRepository repository;
    private UserManager<ApplicationUserView> UserManager;
    public HomeController(IPhotoRepository repository)
    {
        this.repository = repository;
        UserManager = new UserManager<ApplicationUserView>(new UserStore<ApplicationUserView>(this.repository.ApplicationUsers)); ;
    }

 private PhotoDbContext _context = new PhotoDbContext();

        public DbContext ApplicationUsers
        {
            get { return _context; }
        }

public class PhotoDbContext : IdentityDbContext<ApplicationUser>
    {
        public PhotoDbContext()
            : base("Proba")
        {
        }    
    }