title: How to make CalendarService object using access_token?
body: <p>I am trying to use google calendar v3 api using .net client. I am follwing a hybrid approach. I have authorized my application using oauth2 using only http post request and I get the access_token. But as .net client of calendar v3 api, I need to make a calendarservice reference. I need to find any way to get that service reference using my token. Have a look at this code snippet:</p>
  
  <pre><code>Event event = new Event()
  {
    Summary = "Appointment",     
  };
  
  Event recurringEvent = service.Events.Insert(event, "primary").Fetch();
  // here "service" is authenticate calendarservice instance.
  
  Console.WriteLine(recurringEvent.Id);
  </code></pre>
  
  <p>and this is the code to get authenticated calendarservice instance:</p>
  
  <pre><code> UserCredential credential;
   using (var stream = new FileStream("client_secrets.json", FileMode.Open, FileAccess.Read))
   {
        credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
                  GoogleClientSecrets.Load(stream).Secrets,
                  new[] { CalendarService.Scope.Calendar },
                  "user", CancellationToken.None, new FileDataStore("something"));
   }
  
    // Create the service instance.
    var service = new CalendarService(new BaseClientService.Initializer()
    {
            HttpClientInitializer = credential,
            ApplicationName = "Books API Sample",
    });
  </code></pre>
  
  <p>This code shows the authorization code flow according to Google.Apis.Auth.OAuth2 and then make service reference using that credential. Actually this is a helper utility to manage authorization code flow. To be clear, I am not using this procedure.(this helper utility). I am trying to do everything in core level that means I have made authorization code flow manually by simple HTTP web request. And I have done authorization perfectly. Now I have that users access_token.</p>
  
  <p>Now my question is that how can I create this service instance manually only using that access_token. If anything bother you, feel free to ask anything.</p>
  
  <p>N.B - I know how to create CalendarService instance:</p>
  
  <pre><code> var service = new CalendarService();
  </code></pre>
  
  <p>but how can I create this type instance with connected to authenticated token which I have.</p>