Issue while invoking a Asp.Net Core Web Api from Xamarin Forms

Hi:

My Azure app service is a ASP.NET 2.0 Core Web API that is configured with Azure AD B2C authentication.

The problem is that I cannot invoke apis that requires authorization.

I am using the MobileServiceClient (Microsoft.Azure.Mobile.Client version 4.0.1) with the InvokeApiAsync method to do the call but always fails with a null exception. If I call an api that does not have authorization, it works fine.

So my question is if I can use the MobileServiceClient or this doesnot wont work with .NET Core. I dont want to call my apis with HttpClient.

I have more than 2 days trying to call the secure api without luck (for example passing the request headers in the InvokeApiAsync, etc)

Thanks

David