Send dummy request to trigger a 2FA SMS if there’s no 2FA code

A typo in triggering 2FA SMS. See Ruby implementation: https://github.com/github/hub/blob/1.12-stable/lib/hub/github_api.rb#L340.
Merge pull request #713 from github/sms_auth

Send dummy request to trigger a 2FA SMS if there’s no 2FA code