Reformat session based authentication code samples

content/guides/session-based-authentication.md

@@ -85,9 +85,9 @@ module.exports = function HomeHandler(req, res) {
 
   res.setHeader('Content-Type', 'text/HTML)
   res.write(`
-      <h1>Welcome back ${req.session.userid}</h1>
-      <a href="/logout">Logout</a>
-    `);
+    <h1>Welcome back ${req.session.userid}</h1>
+    <a href="/logout">Logout</a>
+  `);
 
   res.end()
 }
@@ -113,13 +113,13 @@ module.exports = function LoginHandler(req, res) {
 
   res.setHeader('Content-Type', 'text/HTML)
   res.write(`
-      <h1>Login</h1>
-      <form method="post" action="/process-login">
-        <input type="text" name="username" placeholder="Username" /> <br>
-        <input type="password" name="password" placeholder="Password" /> <br>
-        <button type="submit">Login</button>
-      </form>
-    `);
+    <h1>Login</h1>
+    <form method="post" action="/process-login">
+      <input type="text" name="username" placeholder="Username" /> <br>
+      <input type="password" name="password" placeholder="Password" /> <br>
+      <button type="submit">Login</button>
+    </form>
+  `);
 
   res.end();
 }