Not asking consent in stripe for saving card for future usage

While using stripe, the card for future usage is saving without asking user consent. I have implemented stripe using Epheremal key. The client said he need to be sked consent before saving it, I read stripe docs and followed same steps but couldn't find the issue.

iam using flutter as frontend

   public function pay(Transaction $transaction): array 
   {
    $customerId = $this->getCustomer($transaction);

    $ephemeralKey = $this->getEphemeralKey($customerId);

    $paymentIntent = $this->api()->paymentIntents->create([
        'amount' => $transaction->amount * 100,
        'currency' => 'AED',
        'description' => 'ABCD',
        'customer' => $customerId,
        'setup_future_usage' => 'off_session',
    ]);

    return $paymentIntent->toArray() + ['ephemeral_key' => $ephemeralKey->secret, 'stripe_customer_id' => $customerId, 'customer_session_client_secret' => null];
}

public function getCustomer(Transaction $transaction)
{
    $transactionModel = $transaction->model;

    if ($transactionModel instanceof Order) {
        $model = $transactionModel->customer;
    }
    if ($transactionModel instanceof Subscription) {
        $model = $transactionModel->merchant;
    }

    if ($model->stripe_customer_id) {
        return $model->stripe_customer_id;
    }

    $customer = $this->api()->customers->create([
        'name' => $model->name,
        'email' => $model->email,
    ]);

    $model->stripe_customer_id = $customer->id;
    $model->save();

    return $customer->id;
}


private function getEphemeralKey(mixed $customerId): EphemeralKey
{
    return $this->api()->ephemeralKeys->create(
        ['customer' => $customerId],
        ['stripe_version' => '2024-09-30.acacia']
    );
}