discord.js setactivity types code example

Example 1: discord js channel send

const user = <client>.users.cache.get('<id>');
user.send('<content>');

Example 2: discord.js setactivity

client.user.setActivity("hello world");

//Note, you have to define cilent

Example 3: discord js channel send

const channel = <client>.channels.cache.get('<id>');
channel.send('<content>');