fix: 참가자 존재 여부 조회 API가 동작하지 않는 문제 수정

controllers/participant.js

@@ -118,7 +118,7 @@ exports.getParticipantExistence = async (req, res, next) => {
       req.query.name,
     );
     return res.json({
-      exist: !!participant,
+      exists: !!participant,
     });
   } catch (error) {
     return next(error);

routes/participant.js

@@ -12,8 +12,8 @@ router.post('/', createParticipant);
 
 router.get('/', getParticipantByName);
 
-router.get('/:participantId', getParticipantById);
-
 router.get('/existence', getParticipantExistence);
 
+router.get('/:participantId', getParticipantById);
+
 module.exports = router;