TypeError: jwt.sign is not a function
<p>I include the express, etc including:</p>

<pre><code>var expressJwt = require('express-jwt'); //https://npmjs.org/package/express-jwt
var secret = 'this is the secret secret secret 12356';
var jwt = require('jsonwebtoken');  //https://npmjs.org/package/node-jsonwebtoken
</code></pre>

<p>then define my sequelize models and epilogue routes and place this here:</p>

<pre><code>app.post('/authenticate', function (req, res) {
  //TODO validate req.body.username and req.body.password
  //if is invalid, return 401
  if (!(req.body.username === 'john.doe' &amp;&amp; req.body.password === 'foobar')) {
    res.status(401).send('Wrong user or password');
    return;
  }

  var profile = {
    first_name: 'John',
    last_name: 'Doe',
    email: 'john@doe.com',
    id: 123
  };

  // We are sending the profile inside the token
  var token = jwt.sign(profile, secret, { expiresInMinutes: 60*5 });

  res.json({ token: token });
});
</code></pre>

<p>When I enter john.doe and foobar in a form, I get told by console that jwt.sign is not a function, even after an npm install.</p>