账号管理功能逻辑修改

src/main/java/com/izouma/nineth/service/UserService.java

@@ -149,6 +149,10 @@ public class UserService {
     }
 
     public User create(UserRegister userRegister) {
+        User users = userRepo.findByUsernameAndDelFalse(userRegister.getUsername()).orElse(null);
+        if (users != null){
+           throw  new BusinessException("该用户名已经存在过");
+        }
         User user = new User();
         BeanUtils.copyProperties(userRegister, user);
         user.setShareRatio(sysConfigService.getBigDecimal("share_ratio"));