"error OAuth2 authentication" on: yarn self-update

[Elliot-Evans-95]

Do you want to request a feature or report a bug?
bug

What is the current behavior?
used yarn self-update and it has produced an error:
error OAuth2 authentication requires a token or key & secret to be set at module.exports.__dirname.authenticate (/Users/elliot/.yarn/node_modules/github/lib/index.js:334:23) at Object.<anonymous> (/Users/elliot/.yarn/lib/cli/commands/self-update.js:30:12) at Generator.next (<anonymous>) at step (/Users/elliot/.yarn/node_modules/babel-runtime/helpers/asyncToGenerator.js:17:30) at /Users/elliot/.yarn/node_modules/babel-runtime/helpers/asyncToGenerator.js:35:14 at F (/Users/elliot/.yarn/node_modules/core-js/library/modules/_export.js:35:28) at Object.<anonymous> (/Users/elliot/.yarn/node_modules/babel-runtime/helpers/asyncToGenerator.js:14:12) at Object.run (/Users/elliot/.yarn/lib/cli/commands/self-update.js:99:17) at run (/Users/elliot/.yarn/lib/cli/index.js:237:18) at config.init.then (/Users/elliot/.yarn/lib/cli/index.js:345:12) info Visit http://yarnpkg.com/en/docs/cli/self-update for documentation about this command.
If the current behavior is a bug, please provide the steps to reproduce.

1. Install yarn via homebrew
2. entered yarn self-update
3. error occurred
   What is the expected behavior?
   To update Yarn to the latest version
   Please mention your node.js, yarn and operating system version.
   OS: MAC OC X El Captain.
   Installed via: homebrew.
   Terminal: iTerm2 with zsh

[Daniel15]

Duplicate(-ish) of #1139. I'm going to close this - Feel free to subscribe to #1139 to get updates on this issue. Thanks for trying Yarn! 😄