new.html.erb

<% flash.each do |name, msg| %>
  <%= msg %>
<% end %>
<%= form_for(@user, :id => "signup") do |f| %>
  <%= f.label :email %>
  <%= f.email_field :email %>
  
  <%= f.label :password %>
  <%= f.password_field :password %>
  
  <%= f.label :password_confirmation %>
  <%= f.password_field :password_confirmation %>
  
  <%= f.submit "Сохранить" %>
<% end %>