Async - AWS SDK for Javascript

async4.js

function updatePlayCount(your_object) {

    return new Promise((resolve, reject) => {

            const LAST_PLAYED_TIME = Math.round(new Date() / 1000);
            
            var params = {
                TableName: "your_table",
                Key: {
                    "cognitoid": your_object.userId,
                    "creationtime": your_object.creationtime
                },
                UpdateExpression: "SET lastPlayed = :time ADD playedCount :val",
                ExpressionAttributeValues:{
                    ":val": 1,
                    ":time": LAST_PLAYED_TIME
                }
            };

            var documentClient = new AWS.DynamoDB.DocumentClient();
            documentClient.update(params, (err, data) => {
                if (err) {
                    console.log("Error when updating DynamoDB");
                    console.log(err); // an error occurred
                    console.log(JSON.stringify(params,null,2));
                    reject(err);
                } else {
                    // console.log(data); // successful response
                    resolve(data);
                }
            });    
        
    });
}