Api for NGN card

[Qasimalizahoor]

Hello, I'm working on API for NGN card. I read documentation API implementation but this package not accepted NGN currency. If we write this code

$payment = Flutterwave::initializePayment($data);

    if ($payment['status'] == 'success') {
        // notify something went wrong
        return $payment ;
    }

work fine..

but I need to take card in request..
Would you please help on it..