C# integration
curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}/customerSubscriptionscurl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/resourceGroups/{resourceGroup}/providers/Microsoft.AzureStack/registrations/{registrationName}/customerSubscriptions/{customerSubscriptionName}