private async Task DoSendContact(UserModel user)
{
if (!(dialogToReturn is DialogModelPlain))
{
return;
}
InputPeer ip = dialogToReturn.InputPeer;
InputMedia media = TL.inputMediaContact(user.PhoneNumber, user.FirstName, user.LastName);
DialogModelPlain dialog = (DialogModelPlain)dialogToReturn;
await dialog.SendMedia(media);
}