So there's no telling who it was to be exact (surely that's what you mean). My guess is that it isn't one of mynode support member/team and why would a legit support channel would ask you to do something not related to mynode which in this case is to make you access a site not related at all to mynode. If it happen on the channel then maybe we can read back and see the messages but if it's a PM then we can't check the conversation. If you are tempted with my suggestions then you should do it but instead of a wallet containing $5 then you should just use a wallet without funds or balance at all so that you can waste his time by checking the dummy wallet with nothing to steal from.