"Y3keLEI354YJdaIC9te84TOflqn2" = uid of person B,
"192FDACA-84C8-49E0-A740-471922CB7C7E" = postid by person A, and
Joe = person A

func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath, for orientation: SwipeActionsOrientation) -> [SwipeAction]? {

        guard orientation == .right else { return nil }

        let delete = SwipeAction(style: .destructive, title: nil) { action, indexPath in
            let savedDB = Database.database().reference().child("saved")
            let selectedPost = self.postArray[indexPath.row]
            let postid = selectedPost.postid
            savedDB.child(?????).child(postid).removeValue()
        }
        configure(action: delete, with: .trash)
        return [delete]
    }