Enlarged access to SignInOrTwoFactorAsync (#1279)
Enlarged access to SignInOrTwoFactorAsync (#1279)

Does https://github.com/aspnet/Identity/issues/1274
aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore,aspnet/AspNetCore