如何添加银行帐户并将其附加到Stripe上的“已连接帐户”？

Stripe API说明了如何创建帐户并对其进行更新：https://stripe.com/docs/api#external_accounts

Stripe Api还解释了如何创建银行帐户：https://stripe.com/docs/api#account_create_bank_account

我正在尝试为已连接的帐户创建一个银行帐户，但遗憾的是我一直屏蔽此错误消息：

缺少必需的参数：external_account .

以下是我开始创建连接帐户的方法：

public function test_stripe_create_connected_account(Request $request)
{

    \Stripe\Stripe::setApiKey("sk_test_...");

    $acct = \Stripe\Account::create(array(
        "country" => "CH",
        "type" => "custom",
        "email" => "test@test.ch"
    ));

}

然后我通过这种方式更新它来完成帐户：

public function test_stripe_update_account(Request $request)
{

    try {

        \Stripe\Stripe::setApiKey("sk_test_...");

        $account = \Stripe\Account::retrieve("acct_1BTRCOB5XLEUUY47");
        $account->support_email = "bruno@krown.ch";
        $account->support_phone = "0041764604220";

        $account->legal_entity->type = "company";
        $account->legal_entity->business_name = "Barbosa Duvanel SARL";
        $account->legal_entity->additional_owners = NULL;

        //NAME
        $account->legal_entity->first_name = "Victor";
        $account->legal_entity->last_name = "Duvanel";

        //BIRTH DATE
        $account->legal_entity->dob->day = 25;
        $account->legal_entity->dob->month = 3;
        $account->legal_entity->dob->year = 1988;

        //ADDRESS
        $account->legal_entity->address->city = "Genève";
        $account->legal_entity->address->country = "CH";
        $account->legal_entity->address->line1 = "Av de la Roseraie 76A";
        $account->legal_entity->address->line2 = "Genève";
        $account->legal_entity->address->postal_code = "1207";
        $account->legal_entity->address->state = "Genève";

        //PERSONAL ADDRESS
        $account->legal_entity->personal_address->city = "Genève";
        $account->legal_entity->personal_address->country = "CH";
        $account->legal_entity->personal_address->line1 = "Av de la Roseraie 76A";
        $account->legal_entity->personal_address->line2 = "Genève";
        $account->legal_entity->personal_address->postal_code = "1207";
        $account->legal_entity->personal_address->state = "Genève";

        //GENERAL CONDITIONS ACCEPTATION
        $account->tos_acceptance->date = time();
        $account->tos_acceptance->ip = $_SERVER['REMOTE_ADDR'];

        $account->save();

        $message = 'OK';
        $status = true;

    } catch (\Exception $error) {
        $message = $error->getMessage();
        $status = false;
    }

    $results = (object)array(
        'message' => $message,
        'status' => $status,
    );

    $response = response()->json($results, 200);
    return $response;

}

最后，我正在尝试将新的银行帐户添加到我的用户中：

public function test_stripe_create_bank_account(Request $request)
{

    try {

        \Stripe\Stripe::setApiKey("sk_test_...");

        $account = \Stripe\Account::retrieve("acct_1BSoOaGS1D3TfSN5");

        $account->external_accounts->create(
            array(
                "object" => "bank_account",
                "account_number" => "CH820024024090647501F",
                "country" => "CH",
                "currency" => "CHF",
            )
        );

        $message = 'OK';
        $status = true;

    } catch (\Exception $error) {
        $message = $error->getMessage();
        $status = false;
    }

    $results = (object)array(
        'message' => $message,
        'status' => $status,
    );

    $response = response()->json($results, 200);
    return $response;

}

我究竟做错了什么？

任何帮助，将不胜感激！