Improve centralized error handling

src/middlewares/auth/authMiddleware.js

@@ -48,12 +48,6 @@ export const authenticate = async (req, res, next) => {
       });
     }
 
-    return res.status(401).json({
-      success: false,
-      error: {
-        message: 'Neplatný alebo expirovaný token',
-        statusCode: 401,
-      },
-    });
+    return next(error);
   }
 };