Ошибка авторизации через Google api

using Google.Apis.Auth.OAuth2; 
using Google.Apis.Sheets.v4; 
using Google.Apis.Sheets.v4.Data; 
using Google.Apis.Services; 
using Google.Apis.Util.Store; 
using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using System.Text; 
using System.Threading; 
using System.Threading.Tasks; 
 
namespace SheetsQuickstart 
{ 
    class Program 
    { 
        // If modifying these scopes, delete your previously saved credentials 
        // at ~/.credentials/sheets.googleapis.com-dotnet-quickstart.json 
        static string[] Scopes = { SheetsService.Scope.SpreadsheetsReadonly }; 
        static string ApplicationName = "bot"; 
 
        static void Main(string[] args) 
        { 
            UserCredential credential; 
 
            using (var stream = 
                new FileStream("client_secret.json", FileMode.Open, FileAccess.Read)) 
            { 
                string credPath = System.Environment.GetFolderPath( 
                    System.Environment.SpecialFolder.Personal); 
                credPath = Path.Combine(credPath, ".credentials/sheets.googleapis.com-dotnet-quickstart.json"); 
 
                credential = GoogleWebAuthorizationBroker.AuthorizeAsync( 
                    GoogleClientSecrets.Load(stream).Secrets, 
                    Scopes, 
                    "user", 
                    CancellationToken.None, 
                    new FileDataStore(credPath, true)).Result; 
                Console.WriteLine("Credential file saved to: " + credPath); 
            } 
 
            // Create Google Sheets API service. 
            var service = new SheetsService(new BaseClientService.Initializer() 
            { 
                HttpClientInitializer = credential, 
                ApplicationName = ApplicationName, 
            }); 
 
            // Define request parameters. 
            String spreadsheetId = "1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms"; 
            String range = "Class Data!A2:E"; 
            SpreadsheetsResource.ValuesResource.GetRequest request = 
                    service.Spreadsheets.Values.Get(spreadsheetId, range); 
 
            // Prints the names and majors of students in a sample spreadsheet: 
            // https://docs.google.com/spreadsheets/d/1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgvE2upms/edit 
            ValueRange response = request.Execute(); 
            IList<IList<Object>> values = response.Values; 
            if (values != null && values.Count > 0) 
            { 
                Console.WriteLine("Name, Major"); 
                foreach (var row in values) 
                { 
                    // Print columns A and E, which correspond to indices 0 and 4. 
                    Console.WriteLine("{0}, {1}", row[0], row[4]); 
                } 
            } 
            else 
            { 
                Console.WriteLine("No data found."); 
            } 
            Console.Read(); 
 
 
        } 
    } 
}

                credential = GoogleWebAuthorizationBroker.AuthorizeAsync( 
                    GoogleClientSecrets.Load(stream).Secrets, 
                    Scopes, 
                    "user", 
                    CancellationToken.None, 
                    new FileDataStore(credPath, true)).Result; 
                Console.WriteLine("Credential file saved to: " + credPath); 
            }