I am new node.js developer.

I am trying to send data from node server to other node server that listening on port 3003, using restify createJsinClient.

It seems like the call is never being invoked - I can't see it on the server, and on the other side I don't get any error (although I have an error handler).

```
sender =  restify.createJsonClient({localhost:3003, version: '*'});
sender.post(sender.url, {userName: user, ID: id}, function (err) {
                if (err) {
                    console.error(err);
                }
                console.log("user - %s sent. ", user)
            });

```

and on my client side, I'm having: 

```
let express = require('express');
let app = express();
app.post('/', function (){
    console.log ('new user');
});

```

I can't see any indicator in the client, nor on the sever.