Ansible provision fails

[manuelcugliari]

Hi, when I lunch 'ansible provision', the command fail at the ansible task with name: Set mysql root password.

TASK: [mysql | Set mysql root password] *************************************** failed: [default] => {"failed": true} msg: when supplying login arguments, both login_user and login_password must be provided

FATAL: all hosts have already failed -- aborting

Thanks, Manuel