Using Integration to attempt to configure for a nest account and I am getting 2 errors.
The first, when I click on the authorize your account link, I get a 404 (Oops! We’ve encountered an error. Please try again.) page on nest.com. Using the OAuth link in my developer page allows me to get a pin, however pasting that pin into the nest config I get the error “Unknown error validating code”
Alright, I found you never show me your config, I double checked source code, I bet your configuration.yaml is not right, You need put your client id and client secret associated with your nest developer account to your configuration.yaml, not CLIENT_ID and CLIENT_SECRET, they are just placeholder in document.