iOS prompts for Apple ID credentials when calling GetPurchasesAsync()

[Th3L0x]

When calling GetPurchasesAsync(ItemType.Subscription) on iOS, the system prompts for Apple ID credentials. This does not happen in other apps, and I would like to understand if this is expected behavior or if there is a way to avoid it.

var billing = CrossInAppBilling.Current;
try
{
    //You must connect
    var connected = await billing.ConnectAsync().ConfigureAwait(false);

    if (!connected)
    {
        //Couldn't connect
        return [];
    }

    var myPuschaes = await billing.GetPurchasesAsync(ItemType.Subscription).ConfigureAwait(false);
    var myProducts = await billing.GetProductInfoAsync(ItemType.Subscription, _productIds).ConfigureAwait(false);
    return myProducts.Select(x => new SubscriptionItem()
    {
        Product = x,
        IsSubscribed = myPuschaes.Where(y => y.ProductId == x.ProductId).Any(),
    });

Is this the correct way to check for active subscriptions?
Should I rely on my own database instead to avoid triggering this prompt?
Is there a way to prevent iOS from requesting credentials?

Would appreciate any insights on whether this is expected behavior or if there’s a workaround.
Thanks!