anchor.diff:  offers a 30-day free trial, then continues free as long as your usage does not exceed certain limits. Provide a name and email address to sign up.
   Once you create an account, you should see the Rollbar main page.
   
  -Kill Bill is preconfigured to send its error logs to Rollbar. All that has to be done is to enable the transfer by providing an access token. The access token is installed by editing a simple configuration file.  
  +Kill Bill is preconfigured to send its error logs to Rollbar. No additional agent is needed. All that has to be done is to enable the transfer by providing an access token. The access token is installed by editing a simple configuration file.  
   
   == Get the Access Token
   
  
positive.code: instance* so the new configuration file will be read. If you have more
  than one instance, follow the same procedure for each one.
  
  Now return to the Rollbar main page and choose *Items*. You should see a list of items like the following, representing significant log entries:
  
  image::errors-rollbar-items.png[align=center]
  
  
  Congratulations. Your Rollbar integration is complete!
  
  == Using Rollbar
  
  The Rollbar site has lots of documentation, so we won't
  repeat any of that here. We will just suggest a few quick steps to get
  started:
  
  
  
  
negative.code: :imagesdir: https://github.com/killbill/killbill-docs/raw/v3/userguide/assets/aws
  
  
  == Overview
  
  Rollbar is an error tracking tool that can be integrated with several types of Kill Bill installations. In this guide we discuss the use of Rollbar to track errors produced
  by two types of implementations on Amazon Web Services (AWS):
  single-tier and multi-tier. With the latest Amazon Machine Image (AMI)
  for Kill Bill, it is very easy to process the Kill Bill logs using
  Rollbar and work with them in the way that best suits your needs.
  
  This discussion applies to installations using Kill Bill 2021.9 or later.
  
  == Set Up Rollbar
  
  