app/views/layouts/application.html.erb
<!DOCTYPE html>
<html>
<head>
<title>Callback</title>
<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %>
<%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
<%= csrf_meta_tags %>
<%= favicon_link_tag 'favicon.ico' %>
</head>
<body>
<div class="container-fluid">
<nav class="row col-sm-12">
<% if current_user %>
<div class="pull-right">
<%= link_to 'Sign out', session_path(current_user), method: :delete %>
</div>
<div class="pull-right">
<%= link_to 'My Profile', profile_path(current_user) %>
</div>
<div class="pull-right">
<%= current_user.email %>
</div>
<% end %>
</nav>
<%= yield %>
</div>
</body>
</html>