code: public Usages getSubscriptionUsages(final String subscriptionCode, final String addOnCode, final QueryParams params) {
         return doGET(Subscription.SUBSCRIPTION_RESOURCE +
                          "/" +
                          subscriptionCode +
                          AddOn.ADDONS_RESOURCE +
                          "/" +
                          addOnCode +
                          Usage.USAGE_RESOURCE, Usages.class, params );
      }
docs: Get Subscription Addon Usages
  <p>
  
  @param subscriptionCode The recurly id of the {@link Subscription }
  @param addOnCode recurly id of {@link AddOn}
  @return {@link Usages} for the specified subscription and addOn