我正在编写一个lambda函数，它从dynamodb获取数据并将其存储在数组中。现在我想从这个数组创建一个csv文件并返回它(最好直接从lambda函数，而不是将其上载到s3，然后共享链接）。你知道怎么做吗？
我的代码到现在为止-

import AWS from "aws-sdk";
import createError from "http-errors";
import commonMiddleware from "../lib/commonMiddleware";
const dynamodb = new AWS.DynamoDB.DocumentClient();
async function getFile(event, context) {
  const { id: someId } = event.pathParameters;
  let data;
  const params = {
    TableName: process.env.TABLE_NAME,
    IndexName: "GSIsomeId",
    KeyConditionExpression: "someId = :someId",
    ExpressionAttributeValues: {
      ":someId": someId,
    },
  };
  try {
    const result = await dynamodb.query(params).promise();
    data = result.Items;
  } catch (error) {
    console.error(error);
    throw new createError.InternalServerError(error);
  }
  // data is array of objects which I can change to 2d array using Object.values()
  // I want to create and return a CSV from this array 
  return {
    statusCode: 200,
    body: JSON.stringify(data),
  };
}
export const handler = commonMiddleware(getFile);