diff --git a/src/middlewares/auth.ts b/src/middlewares/auth.ts
index 37038d7..694fd4f 100644
--- a/src/middlewares/auth.ts
+++ b/src/middlewares/auth.ts
@@ -11,6 +11,7 @@ export async function expressAuthentication(
   switch (securityName) {
     case "keycloak":
       const authData = await keycloakAuth(request, scopes);
+      if (!request.app.locals.logData) request.app.locals.logData = {};
       request.app.locals.logData.sessionId = authData.session_state;
       request.app.locals.logData.user = authData.preferred_username;
       request.app.locals.logData.userName = authData.name;