title: Error: secret option required for sessions (espress session)
body: <p>I always get the same error when I try to run my site on localhost with apache and self-signed ssl certificate. I have no idea why this error appears.
  This is my session persistence, I don't know if there is a misstake, but I can't imagine.... Further down you can finde the error. </p>
  
  <p>I am quite lost at the moment with this issue </p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>app.use(cookieParser(sessionSecret));
  app.use( session( {
      store: sessionStore,
      secret: sessionSecret, resave: false, saveUninitialized: true,
      cookie: {secure: true, maxAge:24*60*60*1000},
      genid: function (req) {return uuid.v4()}
    }));
  app.get('/login*', function (req, res) {console.log("login session is: "+req.session); loadSelectedFile(req, res);});</code></pre>
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  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>Error: secret option required for sessions
      at session (C:\xampp\htdocs\node_modules\express-session\index.js:167:12)
      at Layer.handle [as handle_request] (C:\xampp\htdocs\node_modules\express\lib\router\layer.js:95:5)
      at trim_prefix (C:\xampp\htdocs\node_modules\express\lib\router\index.js:317:13)
      at C:\xampp\htdocs\node_modules\express\lib\router\index.js:284:7
      at Function.process_params (C:\xampp\htdocs\node_modules\express\lib\router\index.js:335:12)
      at next (C:\xampp\htdocs\node_modules\express\lib\router\index.js:275:10)
      at cookieParser (C:\xampp\htdocs\node_modules\cookie-parser\index.js:56:14)
      at Layer.handle [as handle_request] (C:\xampp\htdocs\node_modules\express\lib\router\layer.js:95:5)
      at trim_prefix (C:\xampp\htdocs\node_modules\express\lib\router\index.js:317:13)
      at C:\xampp\htdocs\node_modules\express\lib\router\index.js:284:7
      at Function.process_params (C:\xampp\htdocs\node_modules\express\lib\router\index.js:335:12)
      at next (C:\xampp\htdocs\node_modules\express\lib\router\index.js:275:10)
      at expressInit (C:\xampp\htdocs\node_modules\express\lib\middleware\init.js:40:5)
      at Layer.handle [as handle_request] (C:\xampp\htdocs\node_modules\express\lib\router\layer.js:95:5)
      at trim_prefix (C:\xampp\htdocs\node_modules\express\lib\router\index.js:317:13)
      at C:\xampp\htdocs\node_modules\express\lib\router\index.js:284:7</code></pre>
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