我能够通过这样做来运行服务

systemctl --user start test.target

但是,当我尝试使用journalctl读取其日志时,我收到以下错误消息：

journalctl --user -u test.service
Hint: You are currently not seeing messages from other users and the system.
  Users in the 'systemd-journal' group can see all messages. Pass -q to
  turn off this notice.
No journal files were opened due to insufficient permissions.

如何将journalctl用于用户的特定单元？