app/views/sessions/_sign_in.html.erb
<section id="sign-in" class="sign-in modal">
<header>
<h2><%= t 'sessions.login' %></h2>
</header>
<div>
<ul class="external_providers">
<%= render 'sessions/external_login', :provider => :google %>
<%= render 'sessions/external_login', :provider => :facebook %>
</ul>
<%= render 'shared/vertical_separator' %>
<%= render "sessions/login_form" %>
</div>
</section>