console.log('currentUser', currentUser)
currentUser null

if (!currentUser) {
    console.log('n user not logged in');
    res.status(401).json('User not logged in');
}

TypeError: Cannot read property 'token' of null
at exports.authenticate (sandbox2nghd09backendappcontrollersuser.server.controller.js:47:40)
at Layer.handle [as handle_request] (sandbox2nghd09node_modulesexpresslibrouterlayer.js:95:5)

exports.authenticate = function (req, res, next) {
    var headerExists = req.headers.authorization;
    console.log('authenticate called', headerExists)
    var currentUser = req.headers.authorization.split(' ')[1];
    console.log('currentUser', currentUser)

    if (!currentUser) {
        console.log('n user not logged in');
        res.status(401).json('User not logged in');
    }

    // if (currentUser) {
    var token = JSON.parse(currentUser).token;
    console.log('ntoken', token)
    jwt.verify(token, config.sessionSecret, function (err, decoded) {
        if (err) {
            console.log(err);
            res.status(401).json('Unauthorized');
        } else {
            req.user = decoded.username;
            req.password = decoded.password;
            next();
        }
    })
    // }
}

if (!currentUser) {
  console.log('n user not logged in');
  res.status(401).json('User not logged in');
  //return next();   // should return next here to stop current function
}