Send a message every 5 seconds with Client.on('ready', () => { }); on Discord.js-CodePudding

I would like to send a message every 5 seconds and that the user who reacts first gives him 10 coins.

This code does not work, I got now an error back : Uncaught TypeError TypeError: Cannot read properties of undefined (reading 'channels') on the line : const channel2up22 = guild.channels.cache.get('935549530210983976');

As much as I've watched the doc, I can't do it, I also specify that my Guild ID and my Channel id is correct, I checked it just before posting the question.

Would you have a way to remedy this error,? Thank you in advance!

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

const fs = require('fs')

const guild = Client.guilds.cache.get('925830522138148976');

const channel2up22 = guild.channels.cache.get('935549530210983976');

const userCoin = JSON.parse(fs.readFileSync('Storage/userCoin.json', 'utf-8'));

// placing the function outside of a listener and can be called at anytime
function doSomething() {
    const Embed = new Discord.MessageEmbed()
        .setTitle("Wild Gift