vlv-search/web/views/login.erb

<form class="form form--login" action="/login" method="POST">
  <p>Log in with your VLV credentials</p>
  <% if error_message %>
    <p class="error"><%= error_message %></p>
  <% end %>
  <div class="form__field">
    <label class="form__label">Username</label>
    <input type="text" name="username" class="form__text-field" value="<%= params[:username] %>">
  </div>
  <div class="form__field">
    <label class="form__label">Password</label>
    <input type="password" name="password" class="form__text-field" value="<%= params[:password] %>">
  </div>
  <div class="form__field">
    <input type="submit" value="Login" class="btn form__submit">
  </div>
</form>