How to change error status response in loopback node Js?

In LoopBack, default error status response is :

{
   "error":{
      "statusCode":401,
      "name":"Error",
      "message":"Authorization Required",
      "code":"AUTHORIZATION_REQUIRED",
      "stack":"Error: Authorization Required\n    at /var/www/project/loopback-mysql/node_modules/loopback/lib/application.js:430:21\n    at /var/www/project/loopback-mysql/node_modules/loopback/lib/model.js:358:7\n    at /var/www/project/loopback-mysql/node_modules/loopback/common/models/acl.js:529:16\n    at /var/www/project/loopback-mysql/node_modules/async/dist/async.js:3888:9\n    at /var/www/project/loopback-mysql/node_modules/async/dist/async.js:473:16\n    at iteratorCallback (/var/www/project/loopback-mysql/node_modules/async/dist/async.js:1064:13)\n    at /var/www/project/loopback-mysql/node_modules/async/dist/async.js:969:16\n    at /var/www/project/loopback-mysql/node_modules/async/dist/async.js:3885:13\n    at /var/www/project/loopback-mysql/node_modules/loopback/common/models/acl.js:511:17\n    at /var/www/project/loopback-mysql/node_modules/loopback/common/models/role.js:434:21\n    at process._tickCallback (internal/process/next_tick.js:61:11)"
   }
}

Step-by-step guide:

Following steps involved to change a default error response in loopback:

1. Create error.js (or any name) in server/boot, if it is not already created.
2. Open error.js file and write the following code.

module.exports = function(app) {
   var remotes = app.remotes();
   remotes.options.rest = remotes.options.rest || {};
   remotes.options.rest.handleErrors = false;
   app.middleware('final', FinalErrorHandler);
   function FinalErrorHandler(err, req, res, next) {
      if (err) {
          if (err.statusCode != 200) {
            res.status(err.statusCode).send({
               statusCode: err.statusCode,
               data: {},
               error: {
                 statusCode: err.statusCode,
                 name: 'Error',
                 message: err.message,
              },
            }).end();
         }
      }
      next();
   }
};

Now run node . command in terminal and check the response is change like this:

{
   "statusCode":401,
   "data":{},
   "error":{
      "statusCode":401,
      "name":"Error",
      "message":"Authorization Required"
   }
}

https://medium.com/@ghazaltaimur27/how-to-change-error-status-response-in-loopback-node-js-6db51f595006