Using the AWS SDK in a Lambda handler

You are a backend developer at CloudConnect Corp. Your team uses Lambda functions to coordinate work across AWS services via the AWS SDK (boto3 in Python). Before a function can interact with any service, it needs the correct SDK calls and the right IAM permissions.

In this exercise, you'll create a function that uses boto3 to call STS and retrieve the function's own identity — a quick way to verify the SDK works and see which execution role the function assumed.