Kotlin integration
curl \ -u "$API_USER:$API_PASS" \ https://pricing.twilio.com/v2/Voice/Countries
curl \ -u "$API_USER:$API_PASS" \ https://pricing.twilio.com/v2/Trunking/Countries
curl \
-u "$API_USER:$API_PASS" \
https://pricing.twilio.com/v2/Voice/Countries/{IsoCountry}