Public channels and chats user hasn't joined can't be exported

[Layerex]

Would be nice if chats not present in user chat list were resolved by username or id

[Layerex]

Resolving username:

func tgResolveUsername(tg *tgclient.TGClient, username string) (chat Chat, err error) {
	res := tg.SendSyncRetry(mtproto.TL_contacts_resolveUsername{
		Username: username,
	}, time.Second, 0, 30*time.Second)
	resolvedPeerRes, ok := res.(mtproto.TL_contacts_resolvedPeer)
	if !ok {
		err = merry.Wrap(mtproto.WrongRespError(res))
		return;
	}
	switch chatRes := resolvedPeerRes.Chats[0].(type) {
	case mtproto.TL_user:
		// ...
	case mtproto.TL_chat:
		// ...
	case mtproto.TL_channel:
		// ...
	default:
		err = merry.Wrap(mtproto.WrongRespError(resolvedPeerRes.Chats[0]))
	}
	return
}