public override async Task SaveCertPrivateKeyToFile(string name, string filename)
{
var password = PasswordGenerator.GeneratePassword(64);
var privateKey = await _store.GetPrivateKeyAsync(name, true);
var bytes = privateKey.Export(X509ContentType.Pfx, password);
await File.WriteAllBytesAsync(filename, bytes);
var passwordFile = (filename.EndsWith(".pfx") ? filename.Substring(0, filename.Length - 4) : filename) +
".pw";
await File.WriteAllTextAsync(passwordFile, password);
}