added update_with_otp() method

[krtschmr]

pull request for #147

[mediafinger]

Imo this is application logic. If someone wants to secure certain actions with an OTP, this is already possible to do in any application. I am not convinced this has to be part of this (general) gem.

[krtschmr]

deivse has update_with_password

[mediafinger]

I guess I would have told the person that implemented that in devise the same 😄

But now that it exists, it might make sense to offer the full functionality over the API. Your changes look sensible to me.

Too bad this gem does not have a Rails app to write tests against, to proof such changes work.

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Btw: if you want to make the CI pass, you could adapt the script like this: #155 (comment)