Hello Henry,
I’m attempting to connect Identity Server 4 with Alexa at the moment. I was wondering if you could explain the configuration you have used. I’ve configured the authorization code flow with a HTTP basic client authentication scheme. The authorization step appears to be working for the end-point `<my-idp-uri-here>/connect/authorize?redirect_url=<alexa-gui-uri-here>`, however I can see that for the connect end-point `<my-idp-uri-here>/connect/token` I’m getting the error `IdentityServer4.Validation.ClientSecretValidator:Error: Client secret validation failed for client: alexa.`. I’ve tried numerous configuration changes, including configuring the client to use `AccessTokenType = AccessTokenType.Reference` rather than the default of JWT. Did you have a similar experience, and if so how did you work around it?