Add Duo Pipeline

[eduardo-robles]

Thanks for the work on this Sigma Backend for InsightIDR! I was wondering if we could collaborate on adding Pipeline for Cisco Duo Ingress Authentications? I unfortunately do not know how to write Python. But I have worked out the fieldmappings that would be needed for the pipeline portions. I followed the naming conventions used with a few that I added on my own.

    {
      "ResultType": "source_json.result",
      "ResultDescription": "source_json.reason",
      "AuthenticationFactor": "source_json.factor",
      "Username": "account",
      "ClientApp": "source_json.application.name",
      "City": "geoip_city",
      "Country": "geoip_country_code",
      "Region": "geoip_region"
    }

Would this be something we can work on?