pnpm install lucia-redis-adapter ioredis

you will also need to use oslo and lucia

import Redis from 'ioredis'
import {RedisAdapter} from 'lucia-redis-adapter'
export const redis = new Redis()
let adapter = new RedisAdapter(redis)

as lucia v3 internal validation logic requires to fetch user data and we don't store user data on redis we only store user session , so the function

const { session, user } = await lucia.validateSession(sessionId);

will return the user as object with id undefind