Economy leaderboard command: undefined - discord.js

Question

I am making a discord economy/currency bot, and this is the leaderboard command. It works, but whenever I run the command !leaderboard, I don't get any of the user's tags, I just get the undefined#0000. I would like my leaderboard command to show the users with the highest amount of currency.
const { MessageEmbed } = require('discord.js');
const db = require('quick.db');
module.exports = {
name: "leaderboard",
description: 'server\'s $ leaderboard',
aliases: ['lb'],
}
module.exports.run = async (message) => {
let money = db.all().filter(data => data.ID.startsWith(`money_`)).sort((a, b) => b.data - a.data);
if (!money.length) {
let noEmbed = new MessageEmbed()
.setAuthor(message.member.displayName, message.author.displayAvatarURL())
.setColor("BLUE")
.setFooter("No leaderboard")
return message.channel.send(noEmbed)
};
money.length = 10;
var finalLb = "";
for (var i in money) {
let currency1;
let fetched = await db.fetch(`currency_${message.guild.id}`);
if (fetched == null) {
currency1 = '🎱'
} else {
currency1 = fetched
}
if (money[i].data === null) money[i].data = 0
finalLb += `**${money.indexOf(money[i]) + 1}. ${message.guild.members.cache.get(money[i].ID.split('_')[1]) ? message.guild.members.cache.get(money[i].ID.split('_')[1]).tag : "undefined#0000"}** - ${money[i].data} ${currency1}\n`;
};
const embed = new MessageEmbed()
.setTitle(message.guild.name)
.setColor("BLUE")
.setDescription(finalLb)
.setTimestamp()
.setFooter('Command: !help for currency commands')
message.channel.send(embed);
}

Answer 1

Try following code:
let money = db.all().filter(data => data.ID.startsWith(`money_${message.guild.id}`)).sort((a, b) => b.data - a.data)
money.length = 10;
var finalLb = "";
for (var i in money) {
finalLb += `**${money.indexOf(money[i])+1}. ${client.users.cache.get(money[i].ID.split('_')[1]) ? client.users.cache.get(money[i].ID.split('_')[1]).tag : "Unknown User#0000"}** - ${money[i].data}\n`;
}
const embed = new Discord.MessageEmbed()
.setAuthor(`Global Coin Leaderboard!`, message.guild.iconURL())
.setColor("#7289da")
.setDescription(finalLb)
.setFooter(client.user.tag, client.user.displayAvatarURL())
.setTimestamp()
message.channel.send(embed);
I personally use above code for my bot and it works pretty well for me.

Answer 2

Try putting the client.login('token') at the bottom of your code. Maybe the bot can't find the user tag's because of that?