We are unable to get Account Linking to work with Google's OAuth server. When enabling our skill in the Alexa app, the response we get from the Google side is this:
Apparently this is a relatively new Google security measure? Can the Alexa app provide a different user-agent in its iOS WebView to prevent this problem from happening? I suspect a lot of developers would like to be able to use Google logins for Account Linking. I have heard reports that existing skills are broken because of this.