<%= form_for(resource, :as => resource_name, :url => registration_path(resource_name), :html => { :method => :put }) do |f| %> <%= devise_error_messages! %>
<%= f.label :first_name %> <%= f.text_field :first_name %>
<%= f.label :last_name %> <%= f.text_field :last_name %>
<%= f.label :email %> <%= f.email_field :email %>
<%= f.label :password %> (leave blank if you don't want to change it)
<%= f.password_field :password %>
<%= f.label :password_confirmation %> <%= f.password_field :password_confirmation %>
<%= f.label :current_password %> (we need your current password to confirm your changes)
<%= f.password_field :current_password %>
<%= f.submit "Update", class: 'btn-primary' %> <%= link_to "Back", :back %>
<% end %>

Danger zone

<%= link_to "Cancel account", registration_path(resource_name), class: 'btn btn-danger pull-right', confirm: "All your data will be deleted! Are you sure?", method: :delete %>

If you cancel your account all your data will be deleted!