DBClusterIdentifier: [required] The name of the DB cluster to associate the IAM role with.
RoleArn: [required] The Amazon Resource Name (ARN) of the IAM role to associate with the Aurora DB cluster, for example arn:aws:iam::123456789012:role/AuroraAccessRole.
FeatureName: The name of the feature for the DB cluster that the IAM role is to be associated with. For information about supported feature names, see DBEngineVersion.