Google Apps Script Project: cGoa
This repo (cGoa) was automatically created on 02 November 2015 13:49:24 GMT by GasGit for more information see the desktop liberation site you can see library and dependency information here
This library is a 'pattern light' method of using OAuth2 in Apps Script. It can handle many services such as Google, Microsoft, Github. reddit and more, and can also handle JWT and Google Service accounts.
More details are at https://ramblings.mcpher.com/oauth2-for-apps-script-in-a-few-lines-of-code/