Sorry, after a try in slack, seems for a org/group, slack require all members
login with the same email box, but our contributors don't have the same mail
Let us forgot about it, and communicate by dev list.
From: William Guo <gu...@apache.org>
Sent: Friday, August 11, 2017 7:49:29 AM
Subject: [Vote] Create our own slack team instead of the-asf
It seems the-asf slack only allow developers with apache account to join.
but we have many contributors without apache account,
Let us vote to create a slack team so that all griffin contributors can slack.
This vote will run for at least 72 hours. Please VOTE as follows
 +1 Create a griffin own slack team
 +0 Abstain.
 -1 Do not create new channel because ...