Return login security failed logins

Example response

{
  "data": {
    "failed_logins": [
      {
        "authservice": "dovecot",
        "exptime": "2014-12-07T00:00:00.000Z",
        "logintime": "2014-11-20T00:00:00.000Z",
        "service": "ftp",
        "timeleft": 14,
        "user": "example"
      }
    ]
  },
  "metadata": {
    "command": "get_cphulk_failed_logins",
    "reason": "OK",
    "result": 1,
    "version": 1
  }
}