Can't set up Google Nest

My Google Nest integration stopped being able to see my thermostat, so I deleted the integration and worked through the setup instructions again. As part of the process I created a new OAuth client ID for the project, but I can’t figure out where to put that in HA. When I go through the Nest setup flow in HA, it never asks me for the OAuth info. It sends me to the Google login page, but that fails just saying it can’t connect to the project.

I’m probably just doing something stupid?