anchor.diff:  
   . Select your instance. If you have more than one select only one.
   
  -. Select *Actions*/Security/Modify IAM Role*.
  +. Select *Actions/Security/Modify IAM Role*.
   
   . From the dropdown list choose the role you just created.
   
   . Click *Save*.
  +
  +If you have multiple instances, repeat these steps for each one. You may use the same role for all your instances.
   
   == Test the Installation
   
  
positive.code: 
  == Using CloudWatch
  
  
  
  
  
  
negative.code: you may find useful from the Kill Bill collection, including metrics
  that show the performance and resource use of Kill Bill and Kaui
  themselves, and metrics describing the infrastructure on which these
  systems run. CloudWatch is included automatically in the Kill Bill CloudFormation option, but it can be used with the other AWS options as well.
  
  In this guide we discuss the use of CloudWatch to manage metrics produced
  by single-tier and multi-tier implementations on Amazon Web Services (AWS). The latest Amazon Machine Image (AMI)
  for Kill Bill is preconfigured to direct the Kill Bill metrics to
  CloudWatch and work with them in the way that best suits your needs. These instructions apply to the Kill Bill AMI version 2021.9 or later.
  
  To set up CloudWatch to manage the metrics available from Kill Bill, there
  are five steps:
  
  1. Edit a configuration file to enable the use of CloudWatch.
  2. Install the AWS X-Ray daemon
  3. Create an IAM policy
  4. Create an IAM role
  5. Attach the role to your EC2 instance(s)
  
  == Edit the Configuration File
  
  To authorize the sending of the Kill Bill metrics to CloudWatch, it is necessary to
  edit just one line in this file:
  
  ```
  