Retrieve the status of a response from a query to MySQL with no match

Question

I am working on the login controller of my web app, especially if a user want to log without an existing mail in the DB. I can't reach the res.status in the frontend in order to handle this specific response.

My backend:

exports.signin = (req, res) => {
        const email = req.body.email;
        const password = req.body.password;
        //Recherche du compte associé au email pour vérifié le mdp
       db.query("SELECT password FROM users WHERE email = ?", email, (err, result) => {
           if(result.length === 0){
                    console.log(err)
                    res.status(401).json({err})                
                } else {
                    console.log(result)  
                    let encryptedPassword = result[0].password
                    console.log(encryptedPassword)
                    let verifyPassword = bcrypt.compareSync(password, encryptedPassword)
                    //Vérification du MDP
                    if (verifyPassword === true) {
                        //Requete SQL pour assigné un token en fonction de l'id qui correspond à l'utilisateur dans la BDD
                        db.query("SELECT id, prenom FROM users WHERE email = ?" , email, (err, result) => {
                            if(result){
                                let userID = result[0].id
                                let userPrenom = result[0].prenom
                                console.log(userID)
                                console.log('Le mot de passe correspond à celui renseigné dans la DB')
                                res.status(200).json({user_id: userID,
                                                    prenom:  userPrenom,
                                                    token: jwt.sign(
                                                        {user_id: userID},
                                                        'RANDOM_TOKEN_SECRET',
                                                        { expiresIn: '24h'})})
                            }
                        })}
                    else{
                        res.status(208).send({message: 'pbl'})
                        console.log('Le mot de passe ne correspond pas !')
                    }             
                }           
            }
        )       
    }

I used to have if(err){console.log(err)} but my BACKEND kept crashing whenever I try an unknown email.

My frontend:

const login = () => {
    Axios.post('http://localhost:3001/auth/signin', {
      email: MailLog,
      password: userPasswordLog,
    })
    .then((response) => {
    //Récupérartion des informations user
    if (response.status === 200){
        console.log(response)
        setLoginStatus("Bonjour " + response.data.prenom + " !")}
    else if (response.status === 401) {
        console.log(response)
        setLoginStatus("Nous ne trouvons pas de compte associé à cette adresse mail")}
    else {
        console.log(response)
        setLoginStatus('Le mot de passe et l\'adresse mail ne correspondent pas !')}
    })
    }

What would be the best way to fix my problem? Thank you

NB: The status code is changing when I change it in my res.status yet I can't do anything with it