Rails.logger.info("find current_user: subdomain is #{request.subdomain} and user session is #{session[:user_id]} -- #{session[:"#{request.subdomain}_user_id"]}")
ifsession[:"#{request.subdomain}_user_id"]
Rails.logger.info("find current_user: subdomain is #{request.subdomain} and user session is #{session[:user_id]} -- #{session[:"#{re_subdomain}"]}")