protected async override void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterSingleton <IAppInfo, AppInfoImplementation>();
containerRegistry.RegisterForNavigation <NavigationPage>();
containerRegistry.RegisterForNavigation <LoginPage, LoginPageViewModel>();
containerRegistry.RegisterForNavigation <LobyRoomPage, LobyRoomPageViewModel>();
containerRegistry.RegisterForNavigation <MainPage, MainPageViewModel>();
var videoService = new VideoService();
await videoService.ConnectAsync();
containerRegistry.RegisterInstance <IVideoService>(videoService);
containerRegistry.Register <ICameraService, CameraService>();
}