bookstore/app/views/sessions/welcome.html.erb

<div class='container'>
  <h4>Welcome</h4>
  <div class='row'>
    <% if logged_in? %>
      <p>You are logged in, <%= current_user.email %></p>
      <%= link_to 'Logout', '/logout', method: :get, class: 'btn' %>
    <% else %>
      <p>You are not logged in</p>
      <%= link_to 'Login', '/login', method: :get, class: 'btn' %>
      <%= link_to 'Sign Up', '/users/new', method: :get, class: 'btn' %>
    <% end %>
  </div>
</div>