createInstrument method
Exchange a single use Checkout.com token for a payment instrument reference, that can be used at any time to request one or more payments.
Implementation
@override
Future<Instrument> createInstrument(
{required InstrumentRequest instrumentRequest}) async {
//
Map<String, dynamic> responseMap = await apiBase.call(RESTOption.post,
resource: _instruments,
headers: headers,
body: instrumentRequest.toJson());
return Instrument.fromMap(responseMap);
}