Imports github.com/aws/aws-sdk-go/aws github.com/aws/aws-sdk-go/service/s3 github.com/aws/aws-sdk-go/service/s3/s3iface github.com/aws/aws-sdk-go/service/s3/s3manager github.com/aws/aws-sdk-go/service/s3/s3manager/s3manageriface Standard library imports bytes context fmt