verify method
Implementation
@override
Future<bool> verify(Uint8List message, Uint8List signatureBytes) async {
final crpytographyPublicKey = await _keyPair.extractPublicKey();
final crypt.Signature signature = crypt.Signature(signatureBytes.toList(), publicKey: crpytographyPublicKey);
return crypt.Ed25519().verify(message.toList(), signature: signature);
}