Which AWS service or tool lists all the users in an account and reports on the status of account details, including passwords, access keys, and multi-factor authentication (MFA) devices?

Explanations:

AWS Shield is a security service designed to protect against DDoS attacks. It does not provide user account management or report on user details.

AWS Trusted Advisor offers best practices and recommendations for optimizing AWS accounts, but it does not specifically list users or their credential statuses.

Amazon Inspector is a security assessment service that helps improve the security and compliance of applications deployed on AWS. It does not focus on user management or credentials.

IAM credential report is a feature of AWS Identity and Access Management (IAM) that provides a comprehensive overview of IAM users, including their access keys, passwords, and MFA device statuses. It lists all users and their credential information, making it the correct option.