Add this to index or app js.js

// Event Handler
const eventsPath = path.join(__dirname, "events");
const eventFiles = fs
  .readdirSync(eventsPath)
  .filter((file) => file.endsWith(".js"));

for (const file of eventFiles) {
  const filePath = path.join(eventsPath, file);
  const event = require(filePath);
  if (event.once) {
    client.once(event.name, (...args) => event.execute(...args));
  } else {
    client.on(event.name, (...args) => event.execute(...args));
  }
}