I have two text files, one with discord usernames with #, and another with the same amount of unique urls. I'm trying to make a discord bot to send each person one of the unique urls. I have run into an issue trying to send a test dm to one person. I keep getting the error.

TypeError: Cannot read property 'send' of undefined

    // Require the necessary discord.js classes
    const { Client, Intents } = require('discord.js');
    const { token } = require('./config.json');

    // Create a new client instance
    const client = new Client({ intents: [Intents.FLAGS.GUILDS] });

    // When the client is ready, run this code (only once)
    client.once('ready', () => {
        console.log('Ready');
        client.users.cache.get('877248726085828720').send('yo');
    });

    // Login to Discord with your client's token
    client.login(token);