https://docs.aws.amazon.com/wellarchitected/2024-06-27/framework/sec_securely_operate_aws_account.html
SEC01-BP02 Secure account root user and properties - AWS Well-Architected Framework
The root user is the most privileged user in an AWS account, with full administrative access to all resources within the account, and in some cases cannot be...
aws well architectedsecure accountroot user