extending token validity on markdown endpoint

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

markdown/src/main/java/de/srsoftware/umbrella/markdown/MarkdownApi.java

@@ -28,8 +28,7 @@ public class MarkdownApi extends BaseHandler implements MarkdownService {
 	public boolean doPost(Path path, HttpExchange ex) throws IOException {
 		try {
 			addCors(ex);
-			Optional<Token> token = SessionToken.from(ex).map(Token::of);
-			var user = userService().loadUser(token);
+			var user = userService().refreshSession(ex);
 
 			if (user.isEmpty()) throw UmbrellaException.forbidden("You must be logged in to use the markdown renderer!");
 			var rendered = Util.markdown(body(ex));