How make bot sent message to every server members - discord

Question

Discord,js 12.3.1
How I make bot sent message to every members with all servers?
I want to make bot at on_ready
client.on('ready', async (message) => {
});

Answer 1

Depending on how many servers your bot is on and how many users are in that server, your bot will most likely get banned. I do not recommend this in the slightest.
You can use GuildMemberManager.fetch(), which will fetch all members in a server, partnered with a few for... of loops.
// const client = new Discord.Client();
client.on('ready', async () => {
for (const guild of client.guilds.cache)
for (const user of await guild.members.fetch())
user.send('message').catch(() => console.log('User had DMs disabled'));
});
One problem with this method is that some users may be DMd multiple times if they're in multiple of these servers (aside from the obvious problems being it takes up a huge amount of memory, and your bot will probably get banned)
You could also enable enable the fetchAllMembers option when initializing the client.
Whether to cache all guild members and users upon startup, as well as upon joining a guild (should be avoided whenever possible)
Again, as the description says, this should be avoided whenever possible (I'm only showing it to be thorough).
// const client = new Discord.Client({ fetchAllMembers: true });
client.on('ready', () => {
for (const user of client.users.cache)
user.send('message').catch(() => console.log('User had DMs disabled'));
});
I cannot stress enough how bad of an idea this is.