add_approve_user.rb

Deface::Override.new(:virtual_path => 'spree/admin/users/_form',
  :name => 'add_special_price_to_product_edit',
  :insert_after => "[data-hook=admin_user_form_roles]",
  :text => "
    <div data-hook=\"admin_user_form_approve\" class=\"form-group\">
      <strong><%= Spree.t(:approve_user) %></strong>
      <div class=\"checkbox\">
        <%= f.label :approved do %>
          <%= f.check_box :approved %>
          <%= Spree.t(:approved) %>
        <% end %>
      </div>
    </div>
")