req Properties are null Express

I have a POST method that calls the next() function but when I try to access the res properties I get undefined. If I print:

console.log(res)

I can see the properties that I need but for some reason trying to access them returns undefined. This is my code:

app.post('/login', [function(req, res, next){

req.ID = "hello, world"
next();

}, function(req, res){

  console.log(res) //I can see res.ID I am trying to access in the log
  console.log(res.ID) //undefined
})

I have:

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

at the very top of my file.

via foobar5512