val iapConnector = IapConnector(
            context = this, // activity / context
            nonConsumableKeys = nonConsumablesList, // pass the list of non-consumables
            consumableKeys = consumablesList, // pass the list of consumables
            subscriptionKeys = subsList, // pass the list of subscriptions
            key = "LICENSE KEY" // pass your app's license key
            enableLogging = true // to enable / disable logging
        )

 iapConnector.addPurchaseListener(object : PurchaseServiceListener {
            override fun onPricesUpdated(iapKeyPrices: Map<String, DataWrappers.SkuDetails>) {
                // list of available products will be received here, so you can update UI with prices if needed
            }

            override fun onProductPurchased(purchaseInfo: DataWrappers.PurchaseInfo) {
               // will be triggered whenever purchase succeeded
            }

            override fun onProductRestored(purchaseInfo: DataWrappers.PurchaseInfo) {
                // will be triggered fetching owned products using IapConnector
            }
        })

 iapConnector.addSubscriptionListener(object : SubscriptionServiceListener {
            override fun onSubscriptionRestored(purchaseInfo: DataWrappers.PurchaseInfo) {
                // will be triggered upon fetching owned subscription upon initialization
            }

            override fun onSubscriptionPurchased(purchaseInfo: DataWrappers.PurchaseInfo) {
                // will be triggered whenever subscription succeeded
            }

            override fun onPricesUpdated(iapKeyPrices: Map<String, DataWrappers.SkuDetails>) {
                // list of available products will be received here, so you can update UI with prices if needed
            }
        })

iapConnector.purchase(this, "<sku>")

iapConnector.susbcribe(this, "<sku>")

iapConnector.unsubscribe(this, "<sku>")