Executing playbook encountered an error

[z3473]

ansible-playbook --syntax-check create-user.yml -e "hosts=test user_name=test"
ERROR! The field 'hosts' has an invalid value, which includes an undefined variable. The error was: 'inventory' is undefined

The error appears to be in '/etc/ansible/create-user.yml': line 5, column 3, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:

---

• hosts: '{{inventory}}'
  ^ here
  We could be wrong, but this one looks like it might be an issue with
  missing quotes. Always quote template expression brackets when they
  start a value. For instance:

  with_items:
  - {{ foo }}

Should be written as:

with_items:
  - "{{ foo }}"

[z3473]

[root@localhost ansible]# ansible-playbook create-user.yml -e "inventory=test user_name=test"

PLAY [test] *****************************************************************************************************************

TASK [Gathering Facts] ******************************************************************************************************
fatal: [192.168.2.12]: UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: no such identity: .vagrant/machines/test_box/virtualbox/private_key: No such file or directory\r\nPermission denied (publickey,gssapi-keyex,gssapi-with-mic,password).", "unreachable": true}

PLAY RECAP ******************************************************************************************************************
192.168.2.12 : ok=0 changed=0 unreachable=1 failed=0 skipped=0 rescued=0 ignored=0

[oo1Alan]

try
hosts: {{ inventory }}