**To update the trust policy of an IAM Role to be used with Amazon EMR on EKS**
This example command updates the trust policy of a role named **example_iam_role** such that it can be used with Amazon EMR on EKS with
**example_namespace** namespace from an EKS cluster named **example_cluster**.
* Command::
aws emr-containers update-role-trust-policy \
--cluster example_cluster \
--namespace example_namespace \
--role-name example_iam_role
* Output::
If the trust policy has already been updated, then the output will be:
Trust policy statement already exists for role example_iam_role. No
changes were made!
If the trust policy has not been updated yet, then the output will be:
Successfully updated trust policy of role example_iam_role.