Fix config user

this fix one error.

there's a other, (cannot take a look right now) : 

~~~
failed: [web] => {"changed": true, "cmd": ["pkill", "pserve"], "delta": "0:00:00.025853", "end": "2014-09-22 19:29:03.773893", "rc": 1, "start": "2014-09-22 19:29:03.748040"}
...ignoring
~~~