generatekeys.dart

	    Future<void> _generateKeys() async {
	      //1. Generate keys
	      KeyPair<EcdhPrivateKey, EcdhPublicKey> keyPair =
	          await EcdhPrivateKey.
	    (EllipticCurve.p256);
	      Map<String, dynamic> publicKeyJwk =
	          await keyPair.publicKey.exportJsonWebKey();
	      Map<String, dynamic> privateKeyJwk =
	          await keyPair.privateKey.exportJsonWebKey();
	    }