public void ConfigureServices(IServiceCollectionservices)
{
    services.AddMemoryCache();
    servicesAddHttpClient<IUserApiAuthenticationService,UserApiAuthenticationService>()
        .ConfigureHttpClient(c => c.BaseAddress ="http://urltotheuserapi.com");
    
    services.AddTransient<UserApiAuthenticationHandler();
    services.AddHttpClient<UserService, UserService>()
        .ConfigureHttpClient(c => c.BaseAddress ="http://urltotheuserapi.com")
        AddHttpMessageHandler<UserApiAuthenticationHanler>();
}