添加账户增加非空判断

simulation-resource-server/src/main/java/com/css/simulation/resource/system/service/UserService.java

@@ -90,6 +90,9 @@ public class UserService {
             //新增参数校验
             if(ObjectUtil.isNull(userPO.getId())){
                 ParameterVO parameter = parameterService.getParameterByUserId();
+                if(ObjectUtil.isNull(parameter)){
+                    return null;
+                }
                 int num = parameter.getNumCreateUser();//最大用户数
                 int subUserNum = 0;
                 String userId = AuthUtil.getCurrentUserId();