Refit + Prism Forms + Fusillade + ModernHttpClient

IAuthenticationService.cs

using System.Threading.Tasks;
using Refit;

public interface IAuthenticationService
{
    [Get("/auth/basiclogin")]
    Task<TResult> AuthenticateUserAsync<TResult>([Header("Authorization")] string authorization);

    [Get("/auth/logout")]
    Task<TResult> LogoutUserAsync<TResult>();
    //Important keeping result type as generic which will help you to get desired return type
    //eg:- LogoutUserAsync<HttpResponseMessage>() Getting HttpResponseMessage will help you find exception when service call is failing / deserialization is failing.
    // LogoutUserAsync<LogoutResponseModel>() Expected Type
}

Step 1 : - https://gist.github.com/hamid-shaikh/24d93419f9b5313685c4dfc40f4b59dc
Step 2 : - https://gist.github.com/hamid-shaikh/7a766529e79cea8e108d53c657ca1594
Step 3 : - https://gist.github.com/hamid-shaikh/803e88151281e24bc07fba2a4903cc49
Step 4 : - https://gist.github.com/hamid-shaikh/082fea0c0bb3accc7c1db180d81a9884
Step 5 : - https://gist.github.com/hamid-shaikh/0774fe04cf7121c0d596925c93fc1809