Resource: slack_conversation_member

[rdsubhas]

Current situation / problem

• We can add members to slack_usergroup_members, and then we can set Default channels for a usergroup
• But this is unfortunately a problem, because it's a one-time operation. First time, when a user is added to a usergroup, they get added to the "default" channels of the usergroup.
  • Later, when we want to move teams to different conversations, we can't - if we update channels for a usergroup later – it does not change existing memberships
  • If we remove users from a usergroup, it does not remove them from existing channels

Fix / Proposal

• New resource: slack_conversation_member – Manage a user being present or not in a conversation/channel
• Create: conversations.invite
• Delete: conversations.kick
• Update: Do nothing, let terraform delete & create
• Read: conversations.members (tier4 API call, no need to cache right now but we can do it later if needed)

By managing each membership, we can individually add/remove users from conversations live.

[jmatsu]

But this is unfortunately a problem, because it's a one-time operation.

That's why I haven't supported this resource yet. ignore_changes must be used properly to manage such resources, I guess.

Update: Do nothing, let terraform delete & create

I think doing NOTHING is better. delete and create may generate many messages like someone left. bot invite someone..