Read data from Google analytics using Google Analytics Reporting v4 and a Service account

GoogleAnalyticsReportingv4ServiceAccount.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Google.Apis.AnalyticsReporting.v4;
using Google.Apis.AnalyticsReporting.v4.Data;
using Google.Apis.Auth.OAuth2;
using Google.Apis.Services;

namespace Google_api
{
    class Program
    {
        static void Main()
        {
            try
            {
                var filepath = "";  // path to the json file for the Service account
                var viewid = "";    // id of the view you want to read from
                GoogleCredential credentials;
                using (var stream = new FileStream(filepath, FileMode.Open, FileAccess.Read))
                {
                    string[] scopes = { AnalyticsReportingService.Scope.AnalyticsReadonly };
                    var googleCredential = GoogleCredential.FromStream(stream);
                    credentials = googleCredential.CreateScoped(scopes);
                }

                var reportingService = new AnalyticsReportingService(
                    new BaseClientService.Initializer
                    {
                        HttpClientInitializer = credentials
                    });
                var dateRange = new DateRange
                {
                    StartDate = "2016-07-01",
                    EndDate = "2016-07-31"
                };
                var sessions = new Metric
                {
                    Expression = "ga:pageviews",
                    Alias = "Sessions"
                };
                var date = new Dimension { Name = "ga:date" };

                var reportRequest = new ReportRequest
                {
                    DateRanges = new List<DateRange> { dateRange },
                    Dimensions = new List<Dimension> { date },
                    Metrics = new List<Metric> { sessions },
                    ViewId = viewid
                };
                var getReportsRequest = new GetReportsRequest
                {
                    ReportRequests = new List<ReportRequest> { reportRequest }
                };
                var batchRequest = reportingService.Reports.BatchGet(getReportsRequest);
                var response = batchRequest.Execute();
                foreach (var x in response.Reports.First().Data.Rows)
                {
                    Console.WriteLine(string.Join(", ", x.Dimensions) + "   " + string.Join(", ", x.Metrics.First().Values));
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            Console.ReadLine();
        }
    }
}

The code is broken.
I can get it to kind of connect I guess because the Console.WriteLine is working.
But it keeps loading. So my project is getting stuck when retrieving analytics data.

Please do you know what is wrong in the code?