delete.js

const fetch = require('node-fetch');
// Config
const authToken = '';
const userId = '';
const guildId = '';

const headers = {
  Authorization: authToken
};


const loadMessages = (gid, uid) => fetch(`https://canary.discordapp.com/api/v6/guilds/${gid}/messages/search?author_id=${uid}`, { headers }).then(r => r.json())
const delay = (duration) => new Promise((resolve, reject) => setTimeout(resolve, duration))

async function deleteMsgs() {
  const { messages, total_results } = await loadMessages(guildId, userId)
  console.log(`Found ${total_results} messages`)

  for (const message of messages) {
    const msg = message.find(x => x.author.id === userId);
    if (msg.author.id !== userId) continue;

    console.log(`Deleting ${msg.id}`)

    await fetch(`https://discordapp.com/api/v6/channels/${msg.channel_id}/messages/${msg.id}`, { headers, method: 'DELETE', })


    // Rate limit shit
    await delay(500)
  }
  console.log(`Done clearing ${messages.length} messages.`)
  if (total_results > 25) deleteMsgs();
}


deleteMsgs();