LibreChat/api/strategies/discordStrategy.js

const passport = require('passport');
const { Strategy: DiscordStrategy } = require('passport-discord');
const User = require('../models/User');
const config = require('../../config/loader');
const domains = config.domains;

const discordLogin = new DiscordStrategy(
  {
    clientID: process.env.DISCORD_CLIENT_ID,
    clientSecret: process.env.DISCORD_CLIENT_SECRET,
    callbackURL: `${domains.server}${process.env.DISCORD_CALLBACK_URL}`,
    scope: ['identify', 'email'], // Request scopes
    authorizationURL: 'https://discord.com/api/oauth2/authorize?prompt=none' // Add the prompt query parameter
  },
  async (accessToken, refreshToken, profile, cb) => {
    try {
      const email = profile.email;
      const discordId = profile.id;

      const oldUser = await User.findOne({ email });
      if (oldUser) {
        return cb(null, oldUser);
      }

      let avatarURL;
      if (profile.avatar) {
        const format = profile.avatar.startsWith('a_') ? 'gif' : 'png';
        avatarURL = `https://cdn.discordapp.com/avatars/${profile.id}/${profile.avatar}.${format}`;
      } else {
        const defaultAvatarNum = Number(profile.discriminator) % 5;
        avatarURL = `https://cdn.discordapp.com/embed/avatars/${defaultAvatarNum}.png`;
      }

      const newUser = await User.create({
        provider: 'discord',
        discordId,
        username: profile.username,
        email,
        name: profile.global_name,
        avatar: avatarURL
      });

      cb(null, newUser);
    } catch (err) {
      console.error(err);
      cb(err);
    }
  }
);

passport.use(discordLogin);