protected override void OnModelCreating(DbModelBuilder modelBuilder)

        {

            base.OnModelCreating(modelBuilder); // This needs to go before the other rules!

            modelBuilder.Entity<ApplicationUser>().ToTable("SystemUser").Property(p => p.Id).HasColumnName("UserId");

            modelBuilder.Entity<ApplicationUser>().ToTable("SystemUsers").Ignore(p => p.PhoneNumber);

            modelBuilder.Entity<IdentityRole>().ToTable("SystemRoles");

            modelBuilder.Entity<IdentityUserRole>().ToTable("SystemUserRoles");

            modelBuilder.Entity<IdentityUserLogin>().ToTable("SystemUserLogins");

            modelBuilder.Entity<IdentityUserClaim>().ToTable("SystemUserClaims");

        }