init method
Implementation
Future<String> init() async {
final directory = await _getDocumentsDirectory();
final morphrDir = Directory(path.join(directory.path, 'morphr'));
if (!await morphrDir.exists()) {
await morphrDir.create(recursive: true);
}
final filePath = path.join(morphrDir.path, fileName);
_localPath = filePath;
return filePath;
}