testmycode/tmc-server

<%= form_for :session, :url => sessions_path, html: { class: '' } do |f| %>
  <div class='form-group'>
    <label for='username'>Username or email</label>
    <%= f.text_field :login, class: 'form-control', id: 'username', placeholder: 'Username' %>
  </div>
  <div class='form-group'>
  <label for='password'>Password</label>
  <%= f.password_field :password, class: 'form-control', id: 'password', placeholder: 'Password' %>
  </div>
  <%= f.submit "Sign in", class: "btn btn-primary login-form-button" %>
<% end %>