active_admin_user.rb

ActiveAdmin.register User do

  index do
    column :email
    column :last_sign_in_at
    column :sign_in_count
    default_actions
  end

  form do |f|
    f.inputs "Details" do
      f.input :name
      f.input :email
    end
    f.inputs "Security" do
      f.input :password
      f.input :password_confirmation
    end
    f.buttons
    end
  
end