Notes are required for Oauth, but optional in the api

[miketwo]

To reproduce, follow the documentation but omit the note.

Relevant github docs here: https://developer.github.com/v3/oauth_authorizations/#create-a-new-authorization

(Tested with 2-factor-auth. Not sure if the problem exists with "normal" logins.)

Possible solutions:

1. Make it no longer optional.
2. Keep it optional, but create a default unique message

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[sigmavirus24]

I think this is because GitHub broke their authorizations API and neither I nor anyone else has had time to re-implement the new Authorizations API. It isn't a simple thing to reimplement but it'll be easier now that it's the default and totally broken (and no longer in a preview window).