Trying to change my steam connection

Hi I've been trying to email your support email about changing my steam connection and haven't gotten a reply yet. I apologize for having to resort to the forums and any inconveniences it might be.
I have a new steam account with early access to Poe2 and I would like to connect it so I can mainly access my guild stash. Been playing the new Poe2 with a whole group, we've been enjoying the the content so far especially since most of us are mapping now. Hence the need for my guild stash tabs, since most of the group was free to play in PoE1.
To whoever replies to this post, thank you so much for taking the time to help me with my inquiry!