Getting IAM Execution Role credentials in Lambda@Edge

[lbustelo]

I'm trying to run the following within a Lambda@Edge

const { defaultProvider } = require("@aws-sdk/credential-provider-node");

try {
    console.log('getServerSideProps: getting credentials using defaultProvider...');
    const credentials = await defaultProvider()();
    console.log('getServerSideProps: got credentials from defaultProvider', credentials);
} catch (e) {
    console.log('getServerSideProps: Failed to load credentials with defaultProvider', e);
}

My expectation is that a set of credentials will get generated based on the IAM Execution Role that is attached to the Lambda@Edge. Unfortunately, it falls in to the catch with a TimeoutError.

If I run the same code in a regular Lambda and it works and credentials are logged.

Questions:

1. Is my expectation wrong? Isn't the aws_sdk supposed to be able to get credentials from the IAM Execution Role?
2. Is there additional configuration needed to have IAM based credentials work in Lambda@Edge?
3. Are there any examples?