I'm trying to send data through a POST request from a node.js server to another node.js server. What I do in the "client" node.js is the following:

var options = {
    host: 'my.url',
    port: 80,
    path: '/login',
    method: 'POST'
};

var req = http.request(options, function(res){
    console.log('status: ' + res.statusCode);
    console.log('headers: ' + JSON.stringify(res.headers));
    res.setEncoding('utf8');
    res.on('data', function(chunk){
        console.log("body: " + chunk);
    });
});

req.on('error', function(e) {
    console.log('problem with request: ' + e.message);
});

// write data to request body
req.write('data\n');
req.write('data\n');
req.end();

This chunk is taken more or less from the node.js website so it should be correct. The only thing I don't see is how to include username and password in the options variable to actually login. This is how I deal with the data in the server node.js (I use express):

app.post('/login', function(req, res){
    var user = {};
    user.username = req.body.username;
    user.password = req.body.password;
        ...
});

How can I add those username and password fields to the options variable to have it logged in?

Thanks