downloadAndSaveFile method
Implementation
Future<String> downloadAndSaveFile({ required String url, required String fileName}) async {
final Directory directory = await getApplicationDocumentsDirectory();
final String filePath = '${directory.path}/$fileName';
var response = await HttpClientRepository().getData(url,fName: 'downloadAndSaveFile');
final File file = File(filePath);
await file.writeAsBytes(response.bodyBytes);
return filePath;
}