<% if user_signed_in? %>
• <%= link_to "Missions", missions_path %>
<% else %>
• <%= link_to "About", start_about_path %>
<% end %>

<% if user_signed_in? %>
• <% if current_user.username %> <%= current_user.username %> <% else %> <%= current_user.email %> <% end %>
  • <%= link_to 'Edit profile', edit_user_registration_path %>
  • <%= link_to "Logout", destroy_user_session_path, method: :delete %>
<% else %>
• <%= link_to "Login", new_user_session_path %>
• <%= link_to "Sign Up", new_user_registration_path %>
<% end %>