const chatRoom = await ChatRoom.findOne ( { where: {CR_SEQ : cr_seq} , include: [{ model: ChatUser, as:'AIAB_CR_USER', required: false , include: [{ model: User , attributes:['USER_ID','USER_NM','NICK_NM','BRTHDY','AGE','GENDER','CITY_CODE' ,'EMAIL','PROVIDER','PROVIDER_ID','THUMBNAIL','CR_EXIT_AT'] , as:'TB_USER' , required: false }] }] } ); include - 하위 테이블 조인 attributes - 해당 테이블에서 조회 하려는 컬럼 배열