My code is below, I just have a simple setup for now to make sure my routes are working but im encountering a 404 error. I have an app.all thats catching the error but i dont know where the error is happening at.

heres my index.js file where I have my express server setup running the error catching app.all is in this file

const express = require('express')
const cors = require('cors')
const app = express()
const PORT = process.env.PORT || 8000



app.use(cors())
app.use(express.urlencoded({ extended: true }))

const userRoutes = require('./routes/users.js')

app.get('/', (req, res) => {
    res.send('backened is up')
})


app.use('/', userRoutes)

app.all('*', (req, res, ) => res.send('That route does not exist!'))

app.listen(PORT, () => console.log(`Server running on port ${PORT}`))

heres my routes file where im retrieving the data from the users file.

const express = require('express');
const { getUsers, createUser, deleteUser } = require('../controllers/users.js')
const router = express.Router();


router.get('./users', getUsers)
router.post('./user', createUser)

module.exports = router;

and lastly heres my users file inside my controllers file where im setting up data for the client side

const {v4 : uuidv4} = require('uuid')

let users = []

exports.getUsers = (req, res) => {

    try {
        res.send(users)
    } catch (error) {
        console.error(error)
    }
}

exports.createUser = (req, res) => {
    try {
        const user  = req.body

        users.push({...user, id: uuidv4()})

        res.send("User Added Successfully!")
        
    } catch (error) {
        console.error(error)
    }
}