<PackageReference Include="System.ServiceModel.Primitives" Version="8.1.2" />

System.ServiceModel.Security.Tokens.SspiSecurityToken

namespace System.ServiceModel.Security.Tokens { public class SspiSecurityToken : SecurityToken { public bool AllowUnauthenticatedCallers { get; } public TokenImpersonationLevel ImpersonationLevel { get; } public bool AllowNtlm { get; } public NetworkCredential NetworkCredential { get; } public bool ExtractGroupsForWindowsAccounts { get; } public SspiSecurityToken(TokenImpersonationLevel impersonationLevel, bool allowNtlm, NetworkCredential networkCredential); public SspiSecurityToken(NetworkCredential networkCredential, bool extractGroupsForWindowsAccounts, bool allowUnauthenticatedCallers); } }