orbit-basic/app/views/devise/registrations/new.html.erb

<h2>Sign up</h2>

<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name)) do |f| %>
  <%= devise_error_messages! %>

<!--   <div><%= f.label :email %><br />
  <%= f.email_field :email %></div>
 -->
  <div><%= f.label "Username" %><br />
  <%= f.email_field :user_id %></div>

  <div><%= f.label :password %><br />
  <%= f.password_field :password %></div>

  <div><%= f.label :password_confirmation %><br />
  <%= f.password_field :password_confirmation %></div>

  <div><%= f.submit "Sign up" %></div>
<% end %>

<%= render :partial => "devise/shared/links" %>