This is a Streamsheets Enterprise feature.
Lists all channels within a Slack workspace.
This functions takes an optional JSON parameter to define more advanced settings and additional options. Please refer to https://api.slack.com/methods/conversations.list for more information about available and supported options (as of 2021-05-17).
This function is currently under review.
=SLACK.CHANNEL.LIST(Token [, ResponseTarget, OptionsJSON ])
|Token||A token which is registered to a workspace and has required access rights|
|ResponseTarget||Optional. Specify inbox, outbox, cell or cell-range to write any response to|
|OptionsJSON||Optional. A JSON which contains additional options|
|=SLACK.CHANNEL.LIST("123key",INBOX())||Requests all available channels and sends server response to inbox|
|=SLACK.CHANNEL.LIST("123key",INBOX(), JSON(A1:B1))||Same as before but limits channels in response|