Need of JWT expiresIn field to display on console - node.js

Question

how to get expiry time in JWT?
I want to notice every user the expiration time of login token, right now i could display their userId, email id but unable to display expiresIn timings. Please point out where should i edit my code to display expiresIn field.
router.post("/login", (req, res, next) => {
User.find({ username: req.body.username })
.exec()
.then(user => {
if (user.length < 1) {
return res.status(401).json({
message: "Auth failed"
});
}
bcrypt.compare(req.body.password, user[0].password, (err, result) => {
if (err) {
return res.status(401).json({
message: "Auth failed"
});
}
if (result) {
const token = jwt.sign(
{
username: user[0].username,
email: user[0].email,
userId: user[0]._id,
},
process.env.JWT_KEY,
{
expiresIn: "10h"
}
);
return res.status(200).json({
message: "Auth successful",
token: token,
userId: user[0]._id,
expiresIn: user[0].exp,
});
}
res.status(401).json({
message: "Auth failed"
});
});
})
.catch(err => {
console.log(err);
res.status(500).json({
error: err
});
});
});
This is the output i m getting as of now.
{
"message": "Auth successful",
"token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImRhcnNoYW4iLCJlbWFpbCI6ImRhcnNoYW5hbi4yNEBnbWFpbC5jb20iLCJ1c2VySWQiOiI1YjU3MTcxNmRjODlhYzZiNGUyY2E0MTciLCJpYXQiOjE1Mzg5ODEyOTYsImV4cCI6MTUzONn0.k0PVole653f_pB3CrQLtdUmv7-c00x1irbQph2i2XaE",
"userId": "5b571716dc89ac6b4e2ca417" ,
"email": "darsh4#gmail.com"}

Answer 1

Look like you have not sent the proper expiration response.
let expiration = '10h'
const token = jwt.sign(
{
username: user[0].username,
email: user[0].email,
userId: user[0]._id,
},
process.env.JWT_KEY,
{
expiresIn: expiration
}
);
return res.status(200).json({
message: "Auth successful",
token: token,
userId: user[0]._id,
expiresIn: expiration, //set expiration time
});
Reference link that helps you : here