class DeviseTokenAuth::ConfirmationsController

def show
  @resource = resource_class.confirm_by_token(resource_params[:confirmation_token])
  if @resource.errors.empty?
    yield @resource if block_given?
    redirect_header_options = { account_confirmation_success: true }
    if signed_in?(resource_name)
      token = signed_in_resource.create_token
      signed_in_resource.save!
      redirect_headers = build_redirect_headers(token.token,
                                                token.client,
                                                redirect_header_options)
      redirect_to_link = signed_in_resource.build_auth_url(redirect_url, redirect_headers)
    else
      redirect_to_link = DeviseTokenAuth::Url.generate(redirect_url, redirect_header_options)
   end
    redirect_to(redirect_to_link)
  else
    raise ActionController::RoutingError, 'Not Found'
  end
end