OAuth 2 and RSpotify

I knew that OAuth 2 was replacing OAuth 1, but since I wasn’t actively working on projects that used OAuth 1 I didn’t really internalize it until I was helping someone use the rspotify gem recently and ran into a bunch of issues trying to follow the instructions in the README.

The README is a trap.

Even though it appears to have been updated semi-recently, the setup instructions are outdated. I had to reference an issue from 2016 to figure out why. I searched some other errors and found the omniauth upgrade guide which mainly clarified that the auth request needs to be a POST instead of a GET.