oAuth code is no longer available within app as stated in requirements.
When you click on get code it directs you to a webpage which says "If you are a developer directing your users here to generate a token for your application, please STOP! You should be creating your own OAuth application and integrating auth directly into your application or service."
Requirements should be updated to reflect this for users with low programming skills like myself who can't figure this out by themselves.
Please use this link to generate oAuth codes https://www.cleverbones.co.uk/oauth/