post method
Implementation
Future<TransactionRequestResponse> post({required String account}) async {
final response = await http.post(
link,
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: jsonEncode({'account': account}),
);
if (response.statusCode != 200) {
throw HttpException(response.statusCode, response.body);
}
return TransactionRequestResponse.fromJson(
json.decode(response.body) as Map<String, dynamic>,
);
}