Gets or sets the optional secret that can be used to verify the inregrity and the authenticity of the request using HMAC-SHA256.
System.String.Empty if the signature should not be generated.
Platforms: Windows 10 (Version 21H2 - 23H2), Windows 11 (21H2 - 22H2), Windows Server 2016 - 2022
.NET: .NET Framework 4.8, .NET 6, .NET 7, .NET 8