Add [[maybe_unused]] to silence unhelpful warnings

handlers/handlerusersettings.cpp

@@ -62,7 +62,7 @@ Response HandlerUserSettings::handleRequest(const Request &r)
 	return result;
 }
 
-bool HandlerUserSettings::canAccess(const Permissions &perms)
+bool HandlerUserSettings::canAccess([[maybe_unused]] const Permissions &perms)
 {
 	return this->userSession->loggedIn;
 }