• Send reCAPTCHA on guildMemberAdd event and make link expire in 15 minutes to prevent lingering unverified members
• Links to external page that should be Santa Clara themed (obviously lol)

Command Handler

I see that this bot is using a pretty basic command handler in discord.js. Discord.js supports more multifunctional command handlers. The one this bot is using is also shown at discordjs.guide.

This is normally discouraged as the more advanced command handler you have the easier code becomes for you. If this is actually a bot which is going to become a bot with 80-100 commands you would need a better command handler.

Currently your making an object which is getting exported. Now what if you had an object which was an instance of a class.

Such as, have a class called Command in a file called Command.js one directory above from all your commands.
Then simply say

const Command = require("./Command.js");
module.exports = class PingCommand extends Command {
    // now write code
}

This bot is pretty cool and it will help the bots growth. The problem is when you integrate such a command handler a few command will stop working.

Please have support for better command handlers!

Quick question: Why aren't you using discord.js v12?