anchor.diff:  
   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 by triggering a dry-run invoice. On the main account page, in the Billing Info section, click the *Trigger invoice generation* wand (specify a date at least a month in the future).
   
  -== Using Kill Bill from your application
  +== Using Kill Bill from Your Application
   
   Now that you are familiar with the basics, the next step is to integrate Kill Bill in your application using our APIs. Our https://killbill.github.io/slate/[API documentation] contains snippets to help you get started.
   
  
positive.code: 
  Because Kill Bill supports multi-tenancy (where each tenant has its own data, configuration, etc.), the next step is to create your own tenant. We will assume the api key is `bob` and api secret `lazar` in the rest of this guide.
  
  === Modifying the catalog
  
  The Kill Bill *catalog* contains products and plans definitions. This XML configuration file is really powerful and offers various options for handling trials, add-ons, upgrades/downgrades, etc. For more details on its features, read the http://docs.killbill.io/latest/userguide_subscription.html[Subscription Billing manual].
  
  
negative.code: 
  Once you are ready to integrate with a real payment processor (see http://docs.killbill.io/latest/multi_gateways.html[this tutorial]), all you'll have to do is to create a new payment method for that account. The rest of this tutorial will still apply.
  
  === Creating Your First Subscription
  
  Let's now try to subscribe a user to the Standard plan. This is the call that would need to be triggered from your website, when the user chooses the premium plan on the subscription checkout page.
  
  