Read .aws/credentials
Read .aws/credentials

It is OK only not set default value.

> Remember, if you set your AWS credentials in the shared credentials file or via environment variables, the AWS SDK for Node.js will automatically detect them, and you will not need to perform any manual credential configuration in your application.

http://docs.aws.amazon.com/AWSJavaScriptSDK/guide/node-configuring.html
teebu/node-lambda,DeviaVir/node-lambda,motdotla/node-lambda,teebu/node-lambda,DeviaVir/node-lambda,motdotla/node-lambda