https://groupme.com/join_group/68011898/El8WZ9jt
https://www.reddit.com/r/columbia/comments/n06dnx/groupme_columbia_masters_2021/gwftte4/?context=3
This was posted on Reddit based on a comment someone made in the acceptance results saying they couldn't find the group. Someone just made a new one so hopefully everyone who wants to join is able to find this!