Create RDS instance and send to CloudWatch/SNS

public async Task<string> FunctionHandler(string input, ILambdaContext context)
    {
        // Configure the AWS region and credentials
        var region = RegionEndpoint.USEast1;
        var credentials = new Amazon.Runtime.BasicAWSCredentials("yoursecretkey", "yoursecrettoken");

        // Create an RDS client with the configured region and credentials
        var rdsClient = new AmazonRDSClient(credentials, region);

        // Configure the parameters for the RDS instance
        var dbInstanceIdentifier = "epam-rds-instance";
        var dbInstanceClass = "db.t3.small";
        var engine = "sqlserver-ex";
        var engineVersion = "15.00.4236.7.v1";
        var masterUsername = "admin";
        var masterPassword = "mypassword";
        var subnetGroupName = "dev-nurs-rds-subnet-group";
        var allocatedStorage = 20;

        // Create the request to create an RDS instance
        var createRequest = new CreateDBInstanceRequest
        {
            DBInstanceIdentifier = dbInstanceIdentifier,
            DBInstanceClass = dbInstanceClass,
            Engine = engine,
            EngineVersion = engineVersion,
            MasterUsername = masterUsername,
            MasterUserPassword = masterPassword,
            DBSubnetGroupName = subnetGroupName,
            LicenseModel = "license-included",
            AllocatedStorage = allocatedStorage
        };

        // Create the RDS instance
        var response = await rdsClient.CreateDBInstanceAsync(createRequest);

        // Add a CloudWatch notification
        var cloudWatchClient = new AmazonCloudWatchClient(credentials, region);
        var snsClient = new AmazonSimpleNotificationServiceClient(credentials, RegionEndpoint.USEast1);

        // Set up SNS topic to receive CloudWatch alarm notification
        CreateTopicRequest snsRequest = new CreateTopicRequest
        {
            Name = "RDSInstanceCreated",
        };
        CreateTopicResponse snsResponse = await snsClient.CreateTopicAsync(snsRequest);

        // Subscribe email address to SNS topic
        SubscribeRequest subscribeRequest = new SubscribeRequest
        {
            TopicArn = snsResponse.TopicArn,
            Protocol = "email",
            Endpoint = "anurself@gmail.com"
        };

        SubscribeResponse subscribeResponse = await snsClient.SubscribeAsync(subscribeRequest);

        var cwRequest = new PutMetricAlarmRequest
        {
            AlarmName = $"RDS Instance Created: {dbInstanceIdentifier}",
            ActionsEnabled = true,
            AlarmActions = new List<string> { snsResponse.TopicArn },
            MetricName = "DatabaseConnections",
            Namespace = "AWS/RDS",
            Statistic = "Sum",
            ComparisonOperator = "GreaterThanOrEqualToThreshold",
            Threshold = 1,
            Period = 60,
            EvaluationPeriods = 1,
            Dimensions = new List<Dimension>
            {
                new Dimension { Name = "DBInstanceIdentifier", Value = dbInstanceIdentifier }
            }
        };

        PutMetricAlarmResponse cwResponse = await cloudWatchClient.PutMetricAlarmAsync(cwRequest);

        // Create a new PublishRequest
        var publishRequest = new PublishRequest
        {
            TopicArn = snsResponse.TopicArn,
            Message = $"RDS Instance Created: {dbInstanceIdentifier}"
        };

        // Publish the message to the SNS topic
        var publishResponse = await snsClient.PublishAsync(publishRequest);

        return response.DBInstance.DBInstanceStatus;
    }