educoder/app/controllers/users/base_account_controller.rb

class Users::BaseAccountController < Users::BaseController
  before_action :require_login, :check_auth

  def observed_user
    @_observed_user ||= (User.find_by_id(params[:account_id]) || User.find_by_login(params[:account_id]))
  end

  private

  def require_login
    return if User.current.logged?

    tip_exception(401, "..")
  end
end