bot.js

const fs = require('fs');
const Discord = require('discord.js');
const { prefix } = require('./config.json');

const client = new Discord.Client();
client.commands = new Discord.Collection();
const commandFiles = fs.readdirSync('./commands');
for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    client.commands.set(command.name, command);
}

client.on('ready', () => {
    console.log('I am ready!');
});

client.on('message', message => {
    if (!message.content.startsWith(prefix) || message.author.bot) return;

    const args = message.content.slice(prefix.length).split(/ +/);
    const commandName = args.shift().toLowerCase();

    if (!client.commands.has(commandName)) return;
    const command = client.commands.get(commandName);

    if (command.args && !args.length) {
        return message.channel.send(`You didn't provide any arguments, ${message.author}!`);
    }

    try {
        command.execute(message, args);
    } catch (error) {
        console.error(error);
        message.reply('there was an error trying to execute that command!');
    }
});

// Create an event listener for new guild members
client.on('guildMemberAdd', member => {
    // Send the message to a designated channel on a server:
    const channel = member.guild.channels.find('name', 'member-log');
    // Do nothing if the channel wasn't found on this server
    if (!channel) return;
    // Send the message, mentioning the member
    channel.send(`Hey ${member}, welcome to Sioux Gamers :tada::hugging: ! Please note, that although this server is intended for Sioux employees and their friends, it is a public server and not the place to discuss confidential information.`);
});

client.login(process.env.BOT_TOKEN);