//todo: деавторизация не работает!
public void Deauthorize()
{
_eventAggregator.GetEvent <AuthBarEvents.LogOutRequest>().Publish();
IsAuthorized = false;
UserName = string.Empty;
SetUpAvatar(DEFAULT_AVATAR);
_vkApi.Token.Set(new AccessToken());
var authWindow = new AuthView();//App.Container.GetInstance<AuthView>();
authWindow.Action = AuthAction.Deauthorize;
authWindow.ShowDialog();
VkAuthorization.ClearAllCookies();
//App.SuppressWininetBehavior();
_eventAggregator.GetEvent <AuthBarEvents.LogOutCompleted>().Publish();
}