Enabling IAM database authentication in Amazon Neptune
By default, IAM database authentication is disabled when you create an Amazon Neptune DB cluster. You can enable IAM database authentication (or disable it again) using the Amazon Web Services Management Console.
To create a new Neptune DB cluster with IAM authentication by using the console, follow the instructions for creating a Neptune DB cluster in Launching a Neptune DB cluster using the Amazon Web Services Management Console.
On the second page of the creation process, for Enable IAM DB Authentication, choose Yes.
To enable or disable IAM authentication for an existing DB instance or cluster
Sign in to the Amazon Management Console, and open the Amazon Neptune console at https://console.aws.amazon.com/neptune/home
. In the navigation pane, choose Clusters.
Choose the Neptune DB cluster that you want to modify, and choose Cluster actions. Then choose Modify cluster.
In the Database options section, for IAM DB Authentication, choose either Enable IAM DB authorization or No (to disable). Then choose Continue.
To apply the changes immediately, choose Apply immediately.
Choose Modify cluster.