Python Azure DevOps OAuth enpoint always returns error=InvalidScope

When I request the following authorize URL I will get an error 'InvalidScope'. So, I must be doing something wrong.

https://app.vssps.visualstudio.com/oauth2/authorize?client_id={xxx}&response_type=Assertion&redirect_uri=https%3A%2F%2Foauth.{xxx}.workers.dev%2F&scope=vso.code_full&state=http%3A%2F%2F127.0.0.1%3A8080%2Ftoken