call method 
    
      
Future<ApiCallResponse>
call(
{ - String? tenant = '', 
- String? token = '', 
- String? baseUrl = '', 
- String? platform = '', 
- double? amount, 
- bool? saveBeneficiary, 
- String? serviceCode = '', 
- String? serviceName = '', 
- String? customerNo = '', 
- String? paymentSource = '', 
- String? transactionToken = '', 
}) 
    
    
  Implementation
  Future<ApiCallResponse> call({
  String? tenant = '',
  String? token = '',
  String? baseUrl = '',
  String? platform = '',
  double? amount,
  bool? saveBeneficiary,
  String? serviceCode = '',
  String? serviceName = '',
  String? customerNo = '',
  String? paymentSource = '',
  String? transactionToken = '',
}) {
  final body = '''
{
"serviceCode": "${serviceCode}",
"serviceName": "${serviceName}",
"amount": ${amount},
"saveBeneficiary": ${saveBeneficiary},
"smartCardCode": "${customerNo}",
"paymentSource": "Wallet"
}''';
  return ApiManager.instance.makeApiCall(
    callName: 'rechargeMultichoice',
    apiUrl: '${baseUrl}api/blayzPay/bills/startimes',
    callType: ApiCallType.POST,
    headers: {
      ...BlayzPayAPIGroup.headers,
      'tenant': '${tenant}',
      'Authorization': '${token}',
      'platform': '${platform}',
      'TransactionToken': '${transactionToken}',
    },
    params: {},
    body: body,
    bodyType: BodyType.JSON,
    returnBody: true,
    encodeBodyUtf8: false,
    decodeUtf8: false,
    cache: false,
  );
}