The name of the DB cluster to associate the IAM role with.
The name of the feature for the Neptune DB cluster that the IAM role is to be associated with. For the list of supported feature names, see DBEngineVersion.
The Amazon Resource Name (ARN) of the IAM role to associate with the Neptune DB cluster, for example arn:aws:iam::123456789012:role/NeptuneAccessRole.
arn:aws:iam::123456789012:role/NeptuneAccessRole