dcs-wingmanfinder-members-online.js

const Discord = require("discord.js");
const client = new Discord.Client();

client.login('');

client.on('ready', () => {
    console.log(Logged in as $ {
        client.user.tag
    }!);
    client.user.setActivity('DCS World', {
            type: 'PLAYING'
        })
        .catch(console.error)
});

client.on('message', function(msg) {
            if (msg.author.bot) return
            if (msg.content.startsWith('!online')) {
                const onlineUsers = msg.guild.members.filter(member => member.presence.game == 'DCS World').array()
                var messageText = onlineUsers.length > 0 ? onlineUsers.map(member => member.displayName).join(', ') : 'No online users found right now.'
                msg.channel.send({
                    embed: {
                        "title": "Online Users - DCS World",
                        "color": 53380,
                        "footer": {
                            "text": onlineUsers.length + " online users",
                            "icon_url": "https://i.imgur.com/Thhs8Ky.png"
                        },
                        "thumbnail": {
                            "url": "https://i.imgur.com/3Mfxuzf.jpg"
                        },
                        "description": messageText
                    }
                })
            }