Credentials
With this component you can either use static IAM credentials using an access key and secret access key, or temporary credentials using an access key, secret access key and session token.
Demo application
The demo application module has three site properties. AWSAccessKey and AWSSecretAccessKey for your IAM static user credentials and AWSRegion for the system name of the region you want to use (e.g. eu-central-1).
Permissions
To use a certain action the account needs corresponding IAM permissions. The permission is equivalent to the action name after the dash. e.g. ClassifyDocument for the Comprehend_ClassifyDocument action.
Actions
This component follows very close the official API documentation of Amazon Comprehend. For details on the various parameters check the links.