Autofocus username field

templates/login.html

 <form class="form" method="POST" action="/login">
   <div class="form__field">
     <label for="username" class="form__label">Username</label>
-    <input class="form__text-field" type="text" name="username" required />
+    <input class="form__text-field" type="text" name="username" required autofocus />
   </div>
   <div class="form__field">
     <label for="password" class="form__label">Password</label>