source.json - AWS S3 with IAM Role

{
  "bucket_name": "my-data-warehouse",
  "region": "us-east-1",
  "path_prefix": "data/",
  "file_format": "parquet",
  "max_threads": 10,
  "retry_count": 3
}

Note: No credentials needed when using IAM roles, environment variables, or instance profiles. This is the recommended approach for AWS deployments.