Imports github.com/awslabs/aws-sdk-go/aws github.com/awslabs/aws-sdk-go/aws/awsutil github.com/awslabs/aws-sdk-go/internal/protocol/restxml github.com/awslabs/aws-sdk-go/internal/signer/v4 Standard library imports crypto/md5 encoding/base64 encoding/xml fmt io io/ioutil regexp strings sync time