mod_http_oauth2: Bind refresh tokens to client Prevent one OAuth client from using the refresh tokens issued to another client as required by RFC 6819 section 5.2.2.2 See also draft-ietf-oauth-security-topics-22 section 2.2.2 Thanks to OAuch for pointing out this issue

module:hook("authentication-success", function (event)
	local session = event.session;
	local sasl_handler = session.sasl_handler;
	session.log("info", "Authenticated with %s", sasl_handler and sasl_handler.selected or "legacy auth");
end);