Cron throwing error execution must be a function

[chaitanya1248]

I was trying to integrate node cron to execute in my app.

I followed the simplest example mentioned on the docs to execute a function every second. Here is the snippet:
Cron.schedule('3 * * * * *',()=>{console.log('runs every 3 seconds'); )}

Hoping it would run every 3 seconds. But i get an error saying "execution must be a function".

Using version 3.0.2