anchor.diff:       -H "X-Killbill-ApiKey: bob" \
        -H "X-Killbill-ApiSecret: lazar" \
        -H "Content-Type: application/json" \
  -     "http://127.0.0.1:8080/1.0/kb/accounts/0c9548f0-3c8f-41e8-abe2-966510076daf/payments"
  +     "http://127.0.0.1:8080/1.0/kb/accounts/<ACCOUNT_ID>/payments"
   ----
   
   Kill Bill will now automatically charge the user on a monthly basis. You can estimate the amount which will be billed at a future date (replace the targetDate parameter with a date in the future):
  
positive.code:      -H "Content-Type: application/json" \
       -H "X-Killbill-CreatedBy: demo" \
       -X POST \
       --data-binary '{"accountId":"0c9548f0-3c8f-41e8-abe2-966510076daf","productName":"Standard","productCategory":"BASE","billingPeriod":"MONTHLY","priceList":"DEFAULT"}' \
       "http://127.0.0.1:8080/1.0/kb/subscriptions"
  ----
  
  
negative.code:      -H "X-Killbill-ApiKey: bob" \
       -H "X-Killbill-ApiSecret: lazar" \
       -H "Content-Type: application/json" \
       "http://127.0.0.1:8080/1.0/kb/accounts/<ACCOUNT_ID</bundles"
  ----
  
  The subscription list will show the cancellation status: cancelledDate. If it's null or in the future, the subscriber is still a paying customer, in which case you can apply the 10% discount.
  