Prefix

//https://youtu.be/IJ2jVe9i_Ts
const Discord = require('discord.js');
const client = new Discord.Client();

client.on("message", async message => {
  if(message.author.bot) return;
   const prefix = "sub!";

  if (!message.content.startsWith(prefix)) return;

  let args = message.content.slice(prefix.length).split(/ +/g);
  let cmd = args.shift().toLowerCase();

  if (cmd.length === 0) return;

if (cmd == "ping"){
    message.reply('Pong!')
}

})
client.login(process.env.token)