updated Neptune Readme

Author: scmacdon

kotlin/services/neptune/README.md

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+# Neptune code examples for the SDK for Kotlin
+
+## Overview
+
+Shows how to use the AWS SDK for Kotlin to work with Amazon Neptune.
+
+<!--custom.overview.start-->
+<!--custom.overview.end-->
+
+_Neptune is a serverless graph database designed for superior scalability and availability._
+
+## ⚠ Important
+
+* Running this code might result in charges to your AWS account. For more details, see [AWS Pricing](https://aws.amazon.com/pricing/) and [Free Tier](https://aws.amazon.com/free/).
+* Running the tests might result in charges to your AWS account.
+* We recommend that you grant your code least privilege. At most, grant only the minimum permissions required to perform the task. For more information, see [Grant least privilege](https://docs.aws.amazon.com/IAM/latest/UserGuide/best-practices.html#grant-least-privilege).
+* This code is not tested in every AWS Region. For more information, see [AWS Regional Services](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services).
+
+<!--custom.important.start-->
+<!--custom.important.end-->
+
+## Code examples
+
+### Prerequisites
+
+For prerequisites, see the [README](../../README.md#Prerequisites) in the `kotlin` folder.
+
+
+<!--custom.prerequisites.start-->
+<!--custom.prerequisites.end-->
+
+### Get started
+
+- [Hello Neptune](src/main/java/com/example/neptune/scenerio/HelloNeptune.kt#L9) (`DescribeDBClustersPaginator`)
+
+
+### Basics
+
+Code examples that show you how to perform the essential operations within a service.
+
+- [Learn the basics](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt)
+
+
+### Single actions
+
+Code excerpts that show you how to call individual service functions.
+
+- [CreateDBCluster](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L482)
+- [CreateDBInstance](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L455)
+- [CreateDBSubnetGroup](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L508)
+- [DeleteDBCluster](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L187)
+- [DeleteDBInstance](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L254)
+- [DeleteDBSubnetGroup](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L168)
+- [DescribeDBClusters](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L367)
+- [DescribeDBInstances](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L404)
+- [StartDBCluster](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L331)
+- [StopDBCluster](src/main/java/com/example/neptune/scenerio/NeptuneScenario.kt#L349)
+
+
+<!--custom.examples.start-->
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+
+## Run the examples
+
+### Instructions
+
+
+<!--custom.instructions.start-->
+<!--custom.instructions.end-->
+
+#### Hello Neptune
+
+This example shows you how to get started using Neptune.
+
+
+#### Learn the basics
+
+This example shows you how to do the following:
+
+- Create an Amazon Neptune Subnet Group.
+- Create an Neptune Cluster.
+- Create an Neptune Instance.
+- Check the status of the Neptune Instance.
+- Show Neptune cluster details.
+- Stop the Neptune cluster.
+- Start the Neptune cluster.
+- Delete the Neptune Assets.
+
+<!--custom.basic_prereqs.neptune_Scenario.start-->
+<!--custom.basic_prereqs.neptune_Scenario.end-->
+
+
+<!--custom.basics.neptune_Scenario.start-->
+<!--custom.basics.neptune_Scenario.end-->
+
+
+### Tests
+
+⚠ Running tests might result in charges to your AWS account.
+
+
+To find instructions for running these tests, see the [README](../../README.md#Tests)
+in the `kotlin` folder.
+
+
+
+<!--custom.tests.start-->
+<!--custom.tests.end-->
+
+## Additional resources
+
+- [Neptune User Guide](https://docs.aws.amazon.com/neptune/latest/userguide/intro.html)
+- [Neptune API Reference](https://docs.aws.amazon.com/neptune/latest/apiref/Welcome.html)
+- [SDK for Kotlin Neptune reference](https://sdk.amazonaws.com/kotlin/api/latest/dynamodb/index.html)
+
+<!--custom.resources.start-->
+<!--custom.resources.end-->
+
+---
+
+Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+
+SPDX-License-Identifier: Apache-2.0