onPreresponse interception of the response

onPreResponse.js

server.ext('onPreResponse', function (request, h) {
    const response = request.response;
    // if there's no Boom error, don't bother checking further down
    if (!response.isBoom) {
        return h.continue;
    }
    //let's handle login POST error
    if (request.route.path == '/login' && request.route.method == 'post') {
        //business logic comes here to extract the errors from response.details
        return h.view('login', {
            error: loginError
        });
    }

    return h.continue;
});