Delete an Amazon SNS subscription using an Amazon SDK

        /// <summary>
        /// Given the ARN for an Amazon SNS subscription, this method deletes
        /// the subscription.
        /// </summary>
        /// <param name="client">The initialized Amazon SNS client object, used
        /// to delete an Amazon SNS subscription.</param>
        /// <param name="subscriptionArn">The ARN of the subscription to delete.</param>
        public static async Task TopicUnsubscribeAsync(
            IAmazonSimpleNotificationService client,
            string subscriptionArn)
        {
            var response = await client.UnsubscribeAsync(subscriptionArn);
        }
    }

  Aws::SDKOptions options;
  Aws::InitAPI(options);
  {
    Aws::SNS::SNSClient sns;
    Aws::String subscription_arn = argv[1];

    Aws::SNS::Model::UnsubscribeRequest s_req;
    s_req.SetSubscriptionArn(subscription_arn);

    auto s_out = sns.Unsubscribe(s_req);

    if (s_out.IsSuccess())
    {
      std::cout << "Unsubscribed successfully " << std::endl;
    }
    else
    {
      std::cout << "Error while unsubscribing " << s_out.GetError().GetMessage()
        << std::endl;
    }
  }

  Aws::ShutdownAPI(options);

    public static void unSub(SnsClient snsClient, String subscriptionArn) {

        try {
            UnsubscribeRequest request = UnsubscribeRequest.builder()
                .subscriptionArn(subscriptionArn)
                .build();

            UnsubscribeResponse result = snsClient.unsubscribe(request);
            System.out.println("\n\nStatus was " + result.sdkHttpResponse().statusCode()
                + "\n\nSubscription was removed for " + request.subscriptionArn());

        } catch (SnsException e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

Create the client in a separate module and export it.

import  { SNSClient } from "@aws-sdk/client-sns";
// Set the AWS Region.
const REGION = "REGION"; //e.g. "us-east-1"
// Create SNS service object.
const snsClient = new SNSClient({ region: REGION });
export  { snsClient };

Import the SDK and client modules and call the API.

// Import required AWS SDK clients and commands for Node.js
import {UnsubscribeCommand } from "@aws-sdk/client-sns";
import {snsClient } from "./libs/snsClient.js";

// Set the parameters
const params = { SubscriptionArn: "TOPIC_SUBSCRIPTION_ARN" }; //TOPIC_SUBSCRIPTION_ARN

const run = async () => {
  try {
    const data = await snsClient.send(new UnsubscribeCommand(params));
    console.log("Success.",  data);
    return data; // For unit tests.
  } catch (err) {
    console.log("Error", err.stack);
  }
};
run();

suspend fun unSub(subscriptionArnVal: String) {

    val request = UnsubscribeRequest {
        subscriptionArn = subscriptionArnVal
    }

    SnsClient { region = "us-east-1" }.use { snsClient ->
        snsClient.unsubscribe(request)
        println("Subscription was removed for ${request.subscriptionArn}")
    }
}

require 'vendor/autoload.php';

use Aws\Sns\SnsClient; 
use Aws\Exception\AwsException;

/**
 * Deletes a subscription to an Amazon SNS topic.
 *
 * This code expects that you have AWS credentials set up per:
 * https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/guide_credentials.html
 */
 
$SnSclient = new SnsClient([
    'profile' => 'default',
    'region' => 'us-east-1',
    'version' => '2010-03-31'
]);

$subscription = 'arn:aws:sns:us-east-1:111122223333:MySubscription';

try {
    $result = $SnSclient->unsubscribe([
        'SubscriptionArn' => $subscription,
    ]);
    var_dump($result);
} catch (AwsException $e) {
    // output error message if fails
    error_log($e->getMessage());
} 

class SnsWrapper:
    """Encapsulates Amazon SNS topic and subscription functions."""
    def __init__(self, sns_resource):
        """
        :param sns_resource: A Boto3 Amazon SNS resource.
        """
        self.sns_resource = sns_resource

    def delete_subscription(subscription):
        """
        Unsubscribes and deletes a subscription.
        """
        try:
            subscription.delete()
            logger.info("Deleted subscription %s.", subscription.arn)
        except ClientError:
            logger.exception("Couldn't delete subscription %s.", subscription.arn)
            raise

    TRY.
        lo_sns->unsubscribe( iv_subscriptionarn = iv_subscription_arn ).
        MESSAGE 'Subscription deleted.' TYPE 'I'.
      CATCH /aws1/cx_snsnotfoundexception.
        MESSAGE 'Subscription does not exist.' TYPE 'E'.
      CATCH /aws1/cx_snsinvalidparameterex.
        MESSAGE 'Subscription with "PendingConfirmation" status cannot be deleted/unsubscribed. Confirm subscription before performing unsubscribe operation.' TYPE 'E'.
    ENDTRY.