title: express-jwt handling specific secret passphrase by routes
body: <p>Here is my use case.</p>
  
  <p>In my express app using express-jwt module, I have 2 mains routes. I would like to secure my routes with 2 distincts passphrase.</p>
  
  <pre><code>app.use('/api/v1/admin', jwt({secret: "blabla1"}).unless({path:['/api/v1/admin/login']}));
  app.use('/api/v1', jwt({secret: "blabla2"}).unless({path: ['/api/v1/login']}));
  </code></pre>
  
  <p>In this case, it doesn't work as I was expecting to... 
  Is there a way to achieve this in only one express app ?</p>
  
  <p>Thanks in advance for your helps guys!</p>