TypeError: cb is not a function

[saqibomer]

I am trying to get events and it is raising exception.
/node_modules/icloud/index.js:144 cb(null, body)
TypeError: cb is not a function
This is how I am calling events function.
`instance.login(username, password, function(err) {
if (err) return console.log('login failed');

instance.events("2015-07-16","2016-07-16","America/New_York", function( err, results){
    
    if (err) {
        console.log('failed to fetch contacts');
        res.send(err);
    } else {
        console.log(results.contacts);
        res.send(results.result);
    }
    
});

});`

What I am doing wrong? Running on localhost, macos.