def discovery_uri(host = WORLD_WIDE_AUTHORITY)
      URI(DISCOVERY_TEMPLATE.expand(host: host, endpoint: authorize_endpoint))
    end
def discovery_uri(host = WORLD_WIDE_AUTHORITY)
      URI(DISCOVERY_TEMPLATE.expand(host: host, endpoint: authorize_endpoint))
    end
Creates an instance discovery endpoint url for authority that this object
 represents.

 @return [URI]