# Authentication and access control for Amazon Managed Blockchain (AMB) Access Ethereum
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IAM permissions policies are associated with AWS users in your account and determine who has access to what. Permissions policies specify the actions that each user can perform using AMB Access and other AWS services.

Before you configure IAM permissions, see [Identity and Access Management for Amazon Managed Blockchain (AMB) Access Ethereum](security-iam.md). We also recommend [What is IAM?](https://docs.aws.amazon.com/IAM/latest/UserGuide/introduction.html) and [IAM JSON Policy Reference](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies.html) in the *IAM User Guide*.

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon Managed Blockchain. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query managed-blockchain` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).