anchor.diff:  
   [{"amount":0.00,"currency":"USD","creditAdj":0.00,"refundAdj":0.00,"invoiceId":"15a0abc7-2489-493c-b098-7460afc21203","invoiceDate":"2013-08-25","targetDate":"2013-08-25","invoiceNumber":"1","balance":0.00,"accountId":"268983f2-5443-47e4-a967-b8962fc699c5","auditLogs":null}]
   ----
  +
  +
  +[[five-minutes-change-plan-and-cancel]]
  +
  +==== Upgrade/Cancel the plan for the subscription
  +
  +We will now upgrade the plan from the 'Standard' to the 'Sports' product:
  +
  +[source,bash]
  +----
  +curl -v \
  +     -uadmin:password \
  +     -H"X-Killbill-ApiKey:bob" \
  +     -H"X-Killbill-ApiSecret:lazar" \
  +     -X PUT \
  +     -H "Content-Type: application/json" \
  +     -H "X-Killbill-CreatedBy: creator" \
  +     --data-binary '{"productName":"Sports","productCategory":"BASE","billingPeriod":"MONTHLY","priceList":"DEFAULT"}' \
  +     "http://127.0.0.1:8080/1.0/kb/subscriptions/b623e0bd-45fd-4636-b177-6528228c5f35"
  +----
  +
  +At then finally, we will cancel the subscription.
  +
  +Retrieving the invoices like we did in the previous step would show that a new invoice was automatically created after each change on the subscription. By default Kill Bill reacts to any change happening in the system automatically, creating invoices to match new state and trigerring payments when needed.
  +
  +[source,bash]
  +----
  +curl -v \
  +     -uadmin:password \
  +     -H"X-Killbill-ApiKey:bob" \
  +     -H"X-Killbill-ApiSecret:lazar" \
  +     -X DELETE \
  +     -H "Content-Type: application/json" \
  +     -H "X-Killbill-CreatedBy: creator" \
  +     "http://127.0.0.1:8080/1.0/kb/subscriptions/b623e0bd-45fd-4636-b177-6528228c5f35"
  +----
  +
  
positive.code: {"uri":"/1.0/kb/subscriptions/b623e0bd-45fd-4636-b177-6528228c5f35"}
  ----
  
  At this point, it is interesting to verify that the system immediately invoiced for the subscription that was created. Because the subscription is using a Plan with trial phase of $0, there is no associated payment:
  
  [source,bash]
  ----
  
negative.code: 
  
  [[five-minutes-create-tenant]]
  
  ==== Create your own tenant
  
  