router.post() / redirect

router.post('/:id/profile', upload.single('profile'),(req, res, next)=>{
    const{user} = req
    const{filename} = req.file
    
    user.profileImageKey = filename
    //res.send(`User profile image uploaded. ${filename}`)
    
    res.redirect(`/users/${req.params.id}`)
    
})

res.redirect( ... ${req.params.id} ...)