+ if (req.query.videoChannelId && !await isVideoChannelIdExist(req.query.videoChannelId, res)) return
+ if (req.query.accountName && !await isAccountNameWithHostExist(req.query.accountName, res)) return
+ if (req.query.videoChannelName && !await isVideoChannelNameWithHostExist(req.query.videoChannelName, res)) return