class Aws::IoT::Types::HttpAuthorization
@return [Types::SigV4Authorization]<br>: docs.aws.amazon.com/general/latest/gr/signature-version-4.html<br><br><br><br>Version 4 Signing Process].
Use Sig V4 authorization. For more information, see [Signature
@!attribute [rw] sigv4
The authorization method used to send messages.