code: function(cvc, success, error) {
      success = success || noop;
      error = error || noop;
      exec(success, error, "CordovaStripe", "validateCVC", [cvc]);
    }
docs: Validates a CVC of a card
  @param {string} cvc CVC/CVV
  @param {Function} success
  @param {Function} error
  @example
  function onSuccess() {
  console.log('isValid');
  }
  
  function onError() {
  console.log('invalid');
  }
  
  cordova.plugin.stripe.validateCVC('424', onSuccess, onError);