With .NET Core not initially having support for Windows Authentication using the System.Directory assemblies, I would like to request the addition of a new LDAP Authentication Provider based on the Novell.Directory.Ldap.NETStandard (https://github.com/dsbenghe/Novell.Directory.Ldap.NETStandard) project. This will allow developers to update to the latest ServiceStack while still providing a way to authenticate and authorize against a legacy/non-Azure Active Directory.