getting authentication error

[VanishaGaba]

General information

• Braintree GooglePayment Module version: (com.braintreepayments.api:google-pay:4.26.0)
• Environment: ssue in Sandbox

I am trying to do gpay integration in my application, but getting authentication error, dont know what I am missing or where the issue is. Firstly I am initializing gpay with braintree client which works fine.On click on button this function (onGooglePayButtonClick()) get called but then dialog appears with authentication error

` googlePayClient = GooglePayClient(this, braintreeClient)
googlePayClient.setListener(this)
googlePayClient.isReadyToPay(requireActivity()) { isReadyToPay, error ->
if (isReadyToPay) {
vb.rlGpay.visibility = View.VISIBLE
}
}

fun onGooglePayButtonClick() {
val googlePayRequest = GooglePayRequest()

    googlePayRequest.transactionInfo = TransactionInfo.newBuilder()
        .setTotalPrice("1.00")
        .setTotalPriceStatus(WalletConstants.TOTAL_PRICE_STATUS_FINAL)
        .setCurrencyCode("USD")
        .build()


    googlePayClient.requestPayment(requireActivity(), googlePayRequest)
}

override fun onGooglePaySuccess(paymentMethodNonce: PaymentMethodNonce) {
Log.d("paymentMethodNonce", "$paymentMethodNonce")
}

override fun onGooglePayFailure(error: Exception) {
    if (error is UserCanceledException) {
        Log.d("error", "$error")
    } else {
        Log.d("error", "$error")
    }
}

`