private async Task GoToSellOfferVM()
{
if (_sellOfferVM == null)
{
_sellOfferVM = new SellOfferViewModel(Filter, _authenticationVM.User.User, _authenticationVM.User);
}
await _sellOfferVM.Load();
DisplayedView = _sellOfferVM;
}
private void Logout()
{
_productVM = null;
_buyOfferVM = null;
_sellOfferVM = null;
_buyTransactionVM = null;
_sellTransactionVM = null;
_authenticationVM.User.Password = null;
IsUserAuthenticated = false;
DisplayedView = _authenticationVM;
}