readSigner method
Implementation
@override
Future<CrossmintWalletSigner?> readSigner({
required String walletId,
required String signerLocator,
required String chain,
}) async {
final CrossmintJsonMap response = await _service.readSigner(
walletId,
signerLocator,
);
return _responseParser.walletSignerFromMap(response, chain: chain);
}