using js aws to get review iframe

I am currently trying to use the AWS js Library to get the reviews of a specific product. Unfortunately I do not really know how to send the request to amazon in order to get the iframe object I want to analyze.

I hardcoded the credentials because of testing purposes. So the code looks basically like that:

AWS.config.credentials = new AWS.CognitoIdentityCredentials({
  AccountId : "256675964734",
  accessKeyId : "foo",
  secretAccessKey : "bar"
});

So how do I send the request to amazon as I was unable to find something in their documentation.