Insufficient Permission Error 403 - Google Anaytics API V3

[Sumeet]

I am trying to access Google Analytics API V3 from a .Net Console App.

I am calling the List() under Management.Accounts.

I have used the same sample code as provided at   https://developers.google.com/api-client-library/dotnet/guide/aaa_oauth#service_account   

Every time I try to invoke his API method , it gives an  Insufficient Permission Error 403 as given below:- 

Google.Apis.Requests.RequestError

Insufficient Permission [403]

Errors [ Message [Insufficient Permission] Location[-] Reason[InsufficientPermissions] Domain[global]]

I have correctly setup the Project at Google Developer Console with all the required settings.

Also, I am able to access the accounts for the user when I login to the Google Analytics page as I am the Admin

Here is the code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using System.Threading;

using Google.Apis.Auth.OAuth2;

using Google.Apis.Analytics.v3;

using Google.Apis.Analytics.v3.Data;

using Google.Apis.Services;

using Google.Apis.Util.Store;

namespace Books.ListMyLibrary

{

    /// <summary>

    /// Sample which demonstrates how to use the Books API.

    /// https://code.google.com/apis/books/docs/v1/getting_started.html

    /// <summary>

    internal class Program

    {

        [STAThread]

        static void Main(string[] args)

        {

           

            Console.WriteLine("================================");

            try

            {

                new Program().Run().Wait();

            }

            catch (AggregateException ex)

            {

                foreach (var e in ex.InnerExceptions)

                {

                    Console.WriteLine("ERROR: " + e.Message);

                }

            }

            Console.WriteLine("Press any key to continue...");

            Console.ReadKey();

        }

        private async Task Run()

        {

            UserCredential credential;

            using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))

            {

                credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(

                    GoogleClientSecrets.Load(stream).Secrets,

                    new[] { AnalyticsService.Scope.Analytics},

                    "user", CancellationToken.None, new FileDataStore("Books.ListMyLibrary"));

            }

            // Create the service.

            var service = new AnalyticsService(new BaseClientService.Initializer()

            {

                HttpClientInitializer = credential,

                ApplicationName = "GA-AUL-Console-Analytics-1",  // Name of the project created in Google Developer Console                

                

            });                     

            Accounts res1 = await service.Management.Accounts.List().ExecuteAsync();    //This is where it gives the error in browser 

            int totalResults = (int)res1.TotalResults;           

        }

    }

}

Few Important Notes:

1)  I am able to get the response from the Books API on using the same code

2) I am getting the same insufficient permission error even when I try to use the sample code available for using the ServiceAccountCredential  instead of using the UserCredential stuff.

Any help on this please?

Thanks,

Regards, 

Sumeet.