activiti7禁用SpringSecurity后还能使用candidate users吗

环境：activiti7+SpringBoot2.x，禁用SpringSecurity

Task task = taskService.createTaskQuery()
        .taskId("8cb8c17b-8794-11eb-bea2-84a93e6e4ce0")
        .taskCandidateUser("00011001")
        .singleResult();

报错：org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.security.core.userdetails.UsernameNotFoundException: 00011001
### Cause: org.springframework.security.core.userdetails.UsernameNotFoundException: 00011001

同问！