The Send Slack Message block is a native Slack integration supporting the ability to send an automated message in Slack via the Respell Slack application. Once published or shared, spells containing this block will allow the user to sign into their Slack account through Respell for authentication.
The Send Slack Message block has 2 inputs.
Message: The content of the Slack message.
Channel: The Slack Channel that the message will be shown in. It not a fixed value input, spell user will be prompted to authorize and choose Slack channel from their account.