请问通过 ansible 的 mysql_user 模块初始化数据库（更改root 用户密码）报错，提示 “Access denied for user 'root'@'localhost' (using password: NO)”，这个是怎么回事？

TASK [Create user and set password] *****************************************************************************
fatal: [192.168.1.230]: FAILED! => {"changed": false, "msg": "unable to connect to database, check login_user and login_password are correct or /root/.my.cnf has the credentials. Exception message: (1045, \"Access denied for user 'root'@'localhost' (using password: NO)\")"}

这个是 task 内容，我已经加了 login_user 了，默认密码为空，所以 login_password 也为空了。

    - name: Assign password to mariadb root user
      mysql_user:
        login_user: root
        login_password: ''
        login_host: localhost
        name: root
        host_all: yes
        update_password: always
        password: P@ssw0rd