I'm trying to convert mongoDB data passed by cookie on my client side from my server. I'm using Express et React.js.

Cient:

export default class Profile extends React.Component {

constructor(){
    super();
    this.state = {}
}

componentWillMount(){
    console.log(JSON.stringify(cookie.load('user')))
}

render(){
    return (
        <div>
            <h1>Profile</h1>
        </div>
    )
}

The console.log return :

"j:{\"_id\":\"58e622ac7144862dbb5722f1\",\"password\":\"paswdtest\",\"email\":\"test@test.com\",\"pseudo\":\"testname\",\"__v\":0}"

Server:

const post = (req, res, next) => {


if(req.body.pseudo && req.body.password) {
        User.authenticate(req.body.pseudo, req.body.password, (error, user) => {
            if(error || !user) {
                var error = new Error('Wrong email or password')
                error.status = 401;
                return next(error);
            }
            else {
                req.session.user = user;
                res.cookie('user', req.session.user)
                return res.redirect('/profile');
          }
     })
   }
   else {
        var error = new Error('Email and password are required');
       error.status = 401;
       return next(error);
   }
}

I'm trying to convert with parse and stringlify but it's not working.