find logs without retention

index.js

const { CloudWatchLogs, EC2 } = require("aws-sdk");
const region = "eu-central-1";

module.exports = (async () => {
    try {
        const ec2 = new EC2({
            region
        });

        const { Regions } = await ec2.describeRegions().promise();
        const logGroupsWithoutRetention = Regions.map(async (awsRegion) => {
            const cloudwatchlogs = new CloudWatchLogs({
                region: awsRegion.RegionName
            });

            const groups = await cloudwatchlogs.describeLogGroups().promise();

            return Promise.resolve(groups.logGroups
                // .filter((group) => group.logGroupName.includes("onex"))
                // without retention
                .filter((group) => typeof group.retentionInDays === "undefined")
                .map((group) => ({
                    region: awsRegion.RegionName,
                    ...group
                })));
        });

        const result = await Promise.all(logGroupsWithoutRetention);

        const all = await Promise.all(result
            .map(async (logGroups) => Promise.all(logGroups
                .map((group) => {
                    const cloudwatchlogs = new CloudWatchLogs({
                        region: group.region
                    });

                    console.log(`${group.region}/${group.logGroupName}`);

                    return cloudwatchlogs.deleteLogGroup({
                        "logGroupName": group.logGroupName

                    }).promise();
                }))
            )
        );

        console.log(all.length);

    } catch (e) {
        console.log(e);
    }
})();