Hi, Mike Thanks for the usecase. It makes sense to me and it could be quite common to have vendor specific extension parameters. Just think we may need a generic way to support that for both authorization endpoint and token endpoint...
Here's a suggestion... Pass in real request parameters from HttpRequest into OAuth2Accessor as a Map. This can be set under BasicOAuth2Request.fetch function just before attemptFetch. Then it will be available for all the endpoint to use for the whole OAuth2 flow. Thanks, li
