When page reloaded, the JWT token set the original - node.js

Question

I tried to check JWT token worked actually or not. set in local storage. but after reloading, it set the original automatically. so here is any wrong or good suggestion?
front end:
in front end code is.
let userToken = localStorage.getItem("accessToken")
useEffect(() => {
axios.get(`http://localhost:5000/mycars/${user.uid}`,
{
headers: {
email: user.email,
token: userToken
}
})
.then(response => {
console.log(response);
if (response.data.success) {
setError("No car found")
}
else if (response.data.error) {
setError("Unauthorized access")
}
else {
setMycars(response.data)
setError("")
}
})
.catch(err => {
console.log("error is ", err);
})
}, [user.uid, user.email, userToken])
backend:
app.get('/mycars/:id', async (req, res) => {
const uid = req.params.id;
const getEmail = req.headers.email;
const accessToken = req.headers.token;
try {
const decoded = await jwt.verify(accessToken, process.env.DB_JWTTOKEN,
function (err, decoded) {
let email;
if (err) {
email = "invalid email"
}
if (decoded) {
email = decoded.email
}
return email;
});
// console.log(getEmail, decoded);
if (getEmail === decoded) {
const query = {}
const cursor = carCollection.find(query);
const cars = await cursor.toArray();
const mycars = await cars.filter(car => car.uid === uid)
if (mycars.length === 0) {
res.send({ success: "No car found" })
}
else {
res.send(mycars)
}
}
else {
res.send({ error: "Unauthorized access" })
}
}
catch (err) {
}
with the code , I wanted to check the JWT token manually changing in local storage. when page reloaded, the token execute new. and the edited not remaining