BuildNamedHandler will build a generic handler for signing.

NewSigner returns a Signer pointer configured with the credentials and optional option values provided.

SignSDKRequest signs an AWS request with the V4 signature.

WithUnsignedPayload will enable and set the UnsignedPayload field to true of the signer.

SignRequestHandler is a named request handler the SDK will use to sign service client request with using the V4 signature.

Signer applies AWS v4 signing to given request.