GET /as/authorization.oauth2?response_type=code
        &client_id=s6BhdRkqt3
        &state=xyz
        &scope=openid%20profile%20reademail
        &redirect_uri=https%3A%2F%2Fclient%2Eexample%2Ecom%2Fcb
        &resource=https%3A%2F%2Frs.example.com%2F HTTP/1.1
     Host: authorization-server.example.com