Amazon CloudWatch AWS CloudTrail AWS X-Ray AWS Identity and Access Management (AWS IAM), is required to identify the user that made the api call when an amazon ec2 instance is terminated.
Amazon CloudWatch requires credentials to access. These credentials need to be able to access AWS resources, including getting metrics from CloudWatch about your cloud resources.
The sections that follow go into more depth on how you can use AWS Identity and Access Management (IAM) and CloudWatch to limit who has access to your resources and so help secure them:
Authentication
Access management
To learn more about Amazon CloudWatch here
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