void ReleaseAuth()
{
_srp256 = null;
_srp = null;
_sspi?.Dispose();
_sspi = null;
}
public AuthBlock(string user, string password, WireCryptOption wireCrypt)
{
_srp256 = new Srp256Client();
_srp = new SrpClient();
_sspi = new SspiHelper();
User = user;
Password = password;
WireCrypt = wireCrypt;
}