// service side ctor
public SspiSecurityTokenProvider(NetworkCredential credential, bool extractGroupsForWindowsAccounts, bool allowUnauthenticatedCallers)
{
_token = new SspiSecurityToken(credential, extractGroupsForWindowsAccounts, allowUnauthenticatedCallers);
}
// client side ctor
public SspiSecurityTokenProvider(NetworkCredential credential, bool allowNtlm, TokenImpersonationLevel impersonationLevel)
{
_token = new SspiSecurityToken(impersonationLevel, allowNtlm, credential);
}