Well, it seems I forgot to add the acts_as_authenticated to the repository on my...

[selectricity-live] / app / views / account / login.rhtml

<% form_tag do -%>
<p><label for="login">Login</label><br/>
<%= text_field_tag 'login' %></p>

<p><label for="password">Password</label><br/>
<%= password_field_tag 'password' %></p>

<!-- Uncomment this if you want this functionality
<p><label for="remember_me">Remember me:</label>
<%= check_box_tag 'remember_me' %></p>
-->

<p><%= submit_tag 'Log in' %></p>
<% end -%>