How to pass authorization token in getURI(RCurl) package

Question

I am new to R. I am not able to send authorization token to an API via getURI(RCurl).

Example: I am using following curl command to send an authorization token to an API

curl -H "Authorization:<token>" 'http://api.abc.com/def?id=243073'

Now I want to do the same via getURI(RCurl package) which I am not able to do. Please help me. Your help will be highly appreciated.