woocommerce.deleteCustomer(...) isn't working

[GitGud31]

Trying to delete customer account using the provided methode by the package woocommerce.deleteCustomer(...)

My code:

Future<WooCustomer> delete() async {
    final id = _dbService.getData().id;
    WooCustomer _wooCustomer;
    try {
      _wooCustomer = await _customerController.wooCommerce.value
          .deleteCustomer(customerId: id);
      if (_wooCustomer != null) {
        return _wooCustomer;
      }

    } catch (e) {
            _logger.e(e); //for prints
    }

The error i'm getting from _logger.e(e)

error: status code 501 Not Implemented

Anyone have the same problem ? Or any suggestion or how to delete a customer account ? thanks!