Excel reports builder for Creatio

The code I'm using to access the web service (based on this) is as follows, the cookie is definitely retrieved (though I'm not 100% sure what the `_appUrl` should be):

string _output = "";
string _userName = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
string _userPassword = "XXXXXXXXXXXX";
string _authServiceUrl = "https://XXXXXX-crm-bundle.creatio.com/ServiceModel/AuthService.svc/Login";
string _authServiceUrl2 = "https://XXXXXX-crm-bundle.creatio.com/0/rest/IntExcelReportService/GetExportFiltersKey";
string _appUrl = "https://XXXXXX-crm-bundle.creatio.com/";
var _authCookie = new CookieContainer();

TryLogin();
TryForKey();
Set<string>("ProcessSchemarequestResult", _output);

// Sends a request to the authentication service and processes the response.
void TryLogin() {
    var authData = @"{
        ""UserName"":""" + _userName + @""",
        ""UserPassword"":""" + _userPassword + @"""
    }";
    var request = CreateRequest(_authServiceUrl, authData);
    //_authCookie = new CookieContainer();
    request.CookieContainer = _authCookie;
    // Upon successful authentication, we save authentication cookies for
    // further use in requests to Creatio. In case of failure
    // authentication application console displays a message about the reason
    // of the mistake.
    using (var response = (HttpWebResponse)request.GetResponse())
    {
        if (response.StatusCode == HttpStatusCode.OK)
        {
            using (var reader = new StreamReader(response.GetResponseStream()))
            {
                var responseMessage = reader.ReadToEnd();
                //Console.WriteLine(responseMessage);
                _output = _output + responseMessage + "\n\n";
                if (responseMessage.Contains("\"Code\":1"))
                {
                    throw new UnauthorizedAccessException($"Unauthorized {_userName} for {_appUrl}");
                }
            }
            string authName = ".ASPXAUTH";
            string authCookeValue = response.Cookies[authName].Value;
            _authCookie.Add(new Uri(_appUrl), new Cookie(authName, authCookeValue));
        }
        else
        {
        	_output = _output + response.StatusDescription + "\n\n";
        }
    }
}

void TryForKey() {
	string esqStr = "{\"rootSchemaName\":\"Contact\",\"operationType\":0,\"includeProcessExecutionData\":true,\"filters\":{\"items\":{\"a99615bf-66bc-4ad4-b6da-e2d8949e090b\":{\"filterType\":1,\"comparisonType\":3,\"isEnabled\":true,\"trimDateTimeParameterToDate\":false,\"leftExpression\":{\"expressionType\":0,\"columnPath\":\"Id\"},\"rightExpression\":{\"expressionType\":2,\"parameter\":{\"dataValueType\":1,\"value\":\"98dae6f4-70ae-4f4b-9db5-e4fcb659ef19\"}}}},\"logicalOperation\":0,\"isEnabled\":true,\"filterType\":6},\"columns\":{\"items\":{\"Full name\":{\"caption\":\"Full name\",\"orderDirection\":0,\"orderPosition\":-1,\"isVisible\":true,\"expression\":{\"expressionType\":0,\"columnPath\":\"Name\"}}}},\"isDistinct\":false,\"rowCount\":-1,\"rowsOffset\":-1,\"isPageable\":false,\"allColumns\":false,\"useLocalization\":true,\"useRecordDeactivation\":false,\"serverESQCacheParameters\":{\"cacheLevel\":0,\"cacheGroup\":\"\",\"cacheItemName\":\"\"},\"queryOptimize\":false,\"useMetrics\":false,\"adminUnitRoleSources\":0,\"querySource\":0,\"ignoreDisplayValues\":false,\"isHierarchical\":false}";
	string callData = "EsqString : " + esqStr + ", RecordCollection : [\"98dae6f4-70ae-4f4b-9db5-e4fcb659ef19\"], ReportId : \"ebf37bad-134c-423e-af16-aa0897522de6\"";
    var request = CreateRequest(_authServiceUrl2, callData);
    request.CookieContainer = _authCookie;
    using (var response = (HttpWebResponse)request.GetResponse())
    {
        if (response.StatusCode == HttpStatusCode.OK)
        {
            using (var reader = new StreamReader(response.GetResponseStream()))
            {
                var responseMessage = reader.ReadToEnd();
                //Console.WriteLine(responseMessage);
                _output = _output + responseMessage + "\n\n";
                if (responseMessage.Contains("\"Code\":1"))
                {
                    throw new UnauthorizedAccessException($"Unauthorized {_userName} for {_appUrl}");
                }
            }
        }
        else
        {
        	_output = _output + response.StatusDescription + "\n\n";
        }
    }
}

// Create request to the authentication service.
HttpWebRequest CreateRequest(string url, string requestData = null)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.ContentType = "application/json";
            request.Method = "POST";
            request.KeepAlive = true;
            if (!string.IsNullOrEmpty(requestData))
            {
                using (var requestStream = request.GetRequestStream())
                {
                    using (var writer = new StreamWriter(requestStream))
                    {
                        writer.Write(requestData);
                    }
                }
            }
            return request;
        }

return true;

The error that results:

System.Net.WebException: The remote server returned an error: (401) Unauthorized.
   at System.Net.HttpWebRequest.GetResponse()
   at Terrasoft.Core.Process.UsrProcess_3608a7dMethodsWrapper.<ScriptTask1Execute>g__TryForKey|1_1(<>c__DisplayClass1_0& )
   at Terrasoft.Core.Process.UsrProcess_3608a7dMethodsWrapper.ScriptTask1Execute(ProcessExecutingContext context)
   at Terrasoft.Core.Process.ProcessScriptTask.InternalExecute(ProcessExecutingContext context)
   at Terrasoft.Core.Process.ProcessFlowElement.ExecuteItem(ProcessExecutingContext context)
   at Terrasoft.Core.Process.ProcessFlowElement.Execute(ProcessExecutingContext context)

Gareth Osler,

I was able to implement this in the end, if anyone happens this way and would like to know the solution by all means DM me.

Gareth Osler,

hello Gareth i want to do the same to export a forecast in business process can you please share with me the solution 

Gareth Osler,

Would you mind sharing the solution? I am in the process of trying to achieve the same thing as well. Trying to use a file in a business process.

The solution is long since lost in the mists and fogs of time, I should have posted it, apols.