Describes an existing IAM policy assignment, as specified by the assignment name.
quicksight_describe_iam_policy_assignment(AwsAccountId, AssignmentName,
Namespace)
[required] The ID of the AWS account that contains the assignment that you want to describe.
[required] The name of the assignment.
[required] The namespace that contains the assignment.
svc$describe_iam_policy_assignment( AwsAccountId = "string", AssignmentName = "string", Namespace = "string" )