Added allow_if_user to replace allow_if.

[jacobian]

This allows passing the entire user resource, which means you can switch on
interesting things like user['two_factor_enabled'].

My Ruby-fu is semi-weak, so please LMK if this is the right way to be doing this.

[wuputah]

I'd like to maintain backwards compatibility (and tests) for allow_if. If you're not comfortable drafting that up, I could take a shot.

Please also update the README. 😁

[jacobian]

@wuputah I believe I did maintain compatibility with allow_if -- I didn't remove any tests, at least. Do you mean the deprecation warning? So just keep both allow_if and allow_if_user to peacefully co-exist?

D'oh on the README, I should know better. On it.

[jacobian]

@wuputah this more like what you had in mind?

[wuputah]

Yes! Though it doesn't seem like you're deprecating allow_if now, though that's a design decision (to have both options or only one).

[danp]

👏