Add [[maybe_unused]] to silence unhelpful warnings

handlers/handlerlogin.cpp

@@ -66,7 +66,7 @@ Response HandlerLogin::handleRequest(const Request &r)
 	return result;
 }
 
-bool HandlerLogin::canAccess(const Permissions &perms)
+bool HandlerLogin::canAccess([[maybe_unused]] const Permissions &perms)
 {
 	return true;
 }