Check eligibility for bill payments
POST https://api.vivapayments.com/resellers/v1/transactions/billPayments:validate
Request Body
{"phone"=>"string", "amount"=>nil, "countryCode"=>"string"}
POST https://api.vivapayments.com/resellers/v1/transactions/billPayments:validate
{"phone"=>"string", "amount"=>nil, "countryCode"=>"string"}