fix: 修复了无社团用户无法登录的BUG

src/main/java/org/mmga/clubs/controller/ClubController.java

@@ -23,4 +23,5 @@ public class ClubController {
     public BaseResponse<ClubInformation> getClub(@RequestParam("id") int clubId){
         return clubService.getClubInformationById(clubId);
     }
+
 }

src/main/java/org/mmga/clubs/service/ClubService.java

@@ -43,6 +43,9 @@ public class ClubService {
     }
     public Club getClubByUserId(int userId){
         ClubUserAuthVo clubUserAuthVoByUserId = this.clubUserAuthDao.getClubUserAuthVoByUserId(userId);
+        if (clubUserAuthVoByUserId == null){
+            return null;
+        }
         int i = clubUserAuthVoByUserId.authId();
         Auth auth = i != -1 ? authService.getAuthById(i) : null;
         Club clubById = getClubWithoutAuthById(clubUserAuthVoByUserId.clubId());