new.html.erb

<h2>Sign up</h2>

<%= form_for(resource_name, resource, :url => registration_path(resource_name)) do |f| %>
  <%= f.error_messages %>
  <p><%= f.label :username %></p>
  <p><%= f.text_field :username %></p>
  
  <p><%= f.label :email %></p>
  <p><%= f.text_field :email %></p>

  <p><%= f.label :password %></p>
  <p><%= f.password_field :password %></p>

  <p><%= f.label :password_confirmation %></p>
  <p><%= f.password_field :password_confirmation %></p>

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

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