//! AWS Signature Version 4
//!//! See <https://docs.aws.amazon.com/AmazonS3/latest/API/sig-v4-header-based-auth.html>
//!//! See <https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-query-string-auth.html>
//!modpresigned_url;pubuseself::presigned_url::*;modmethods;pubuseself::methods::*;