How do I dynamically scale AWS DynamoDB with AppAutoScaling?

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Define the DynamoDB table
const dynamoTable = new aws.dynamodb.Table("myTable", {
    attributes: [
        { name: "Id", type: "S" },
    ],
    hashKey: "Id",
    readCapacity: 5,
    writeCapacity: 5,
    streamEnabled: true,
    streamViewType: "NEW_AND_OLD_IMAGES",
});

// Define the role for Application Auto Scaling
const role = new aws.iam.Role("autoScalingRole", {
    assumeRolePolicy: aws.iam.assumeRolePolicyForPrincipal({
        Service: "application-autoscaling.amazonaws.com",
    }),
});

// Attach the necessary policies to the role
const policyAttachment = new aws.iam.RolePolicyAttachment("autoScalingPolicy", {
    role: role.name,
    policyArn: "arn:aws:iam::aws:policy/service-role/AmazonDynamoDBFullAccess",
});

// Create a scalable target for the DynamoDB table's read capacity
const readScalableTarget = new aws.appautoscaling.Target("readScalableTarget", {
    maxCapacity: 20,
    minCapacity: 5,
    resourceId: pulumi.interpolate`table/${dynamoTable.name}`,
    scalableDimension: "dynamodb:table:ReadCapacityUnits",
    serviceNamespace: "dynamodb",
    roleArn: role.arn,
});

// Create a scalable target for the DynamoDB table's write capacity
const writeScalableTarget = new aws.appautoscaling.Target("writeScalableTarget", {
    maxCapacity: 20,
    minCapacity: 5,
    resourceId: pulumi.interpolate`table/${dynamoTable.name}`,
    scalableDimension: "dynamodb:table:WriteCapacityUnits",
    serviceNamespace: "dynamodb",
    roleArn: role.arn,
});

// Define a scaling policy for read capacity
const readScalingPolicy = new aws.appautoscaling.Policy("readScalingPolicy", {
    policyType: "TargetTrackingScaling",
    resourceId: readScalableTarget.resourceId,
    scalableDimension: readScalableTarget.scalableDimension,
    serviceNamespace: readScalableTarget.serviceNamespace,
    targetTrackingScalingPolicyConfiguration: {
        targetValue: 70.0,
        predefinedMetricSpecification: {
            predefinedMetricType: "DynamoDBReadCapacityUtilization",
        },
        scaleInCooldown: 60,
        scaleOutCooldown: 60,
    },
});

// Define a scaling policy for write capacity
const writeScalingPolicy = new aws.appautoscaling.Policy("writeScalingPolicy", {
    policyType: "TargetTrackingScaling",
    resourceId: writeScalableTarget.resourceId,
    scalableDimension: writeScalableTarget.scalableDimension,
    serviceNamespace: writeScalableTarget.serviceNamespace,
    targetTrackingScalingPolicyConfiguration: {
        targetValue: 70.0,
        predefinedMetricSpecification: {
            predefinedMetricType: "DynamoDBWriteCapacityUtilization",
        },
        scaleInCooldown: 60,
        scaleOutCooldown: 60,
    },
});

// Export the DynamoDB table name and ARN
export const tableName = dynamoTable.name;
export const tableArn = dynamoTable.arn;