BUGFIX: 用户支付后获取账号到期时间为空，无法更新账号信息

src/main/java/com/ai/da/service/impl/AccountServiceImpl.java

@@ -2788,7 +2788,8 @@ public class AccountServiceImpl extends ServiceImpl<AccountMapper, Account> impl
     public boolean updateAccountValidity(Long accountId, Long currentPeriodEnd){
         // 不管当前用户的账号是否到期，都根据付款信息重置账号到期时间
         Account account = accountMapper.selectById(accountId);
-        if (account.getValidEndTime().equals(currentPeriodEnd * 1000)){
+        if (!Objects.isNull(account.getValidEndTime())
+                && account.getValidEndTime().equals(currentPeriodEnd * 1000)){
             return false;
         }else {
             account.setValidEndTime(currentPeriodEnd * 1000);