Flutter - createPhoneToken not working

import 'package:appwrite/appwrite.dart';

void main() { // Init SDK
  Client client = Client();
  Account account = Account(client);

  client
    .setEndpoint('https://cloud.appwrite.io/v1') // Your API Endpoint
    .setProject('MY_PROJECT_ID') // Your project ID
  ;
  Future result = account.createPhoneSession(
    userId: ID.unique(),
    phone: '+593999999999',
  );

  result
    .then((response) {
      print(response);
    }).catchError((error) {
      print(error.response);
  });
}

AppwriteException (AppwriteException: general_route_not_found, The requested route was not found. Please refer to the API docs and try again. (404))
[log] #0      ClientMixin.prepareResponse (package:appwrite/src/client_mixin.dart:73:9)
      #1      ClientIO.call (package:appwrite/src/client_io.dart:383:14)
      <asynchronous suspension>
      #2      Account.createPhoneToken (package:appwrite/services/account.dart:1084:17)