Confirm there are no Amazon IAM users (privileged users) with administrator permissions for your AWS account.
A privileged IAM user can access all AWS services and control resources through the AdministratorAccess IAM managed policy. Any user with administrator access that should not have access can potentially, whether unknowingly or purposefully, cause security issues or data leaks.
Follow the Removing a permissions policy from a user docs to revoke AdministratorAccess for a user.
list-users to get a list of current IAM users.
list-user-policies with an IAM
user-name to find the users attached policies.
aws iam list-user-policies --user-name Name
detach-user-policy to revoke Administrator access for that user.
aws iam detach-user-policy --user-name Bob --policy-arn arn:aws:iam::123456789012:policy/TesterPolicy