After starting the Helix Plan Slack integration, you need to invite the bot user (@Helix Plan) to the Slack channels you want to use the integration in.
1. Enter the following in the Slack channel:
/invite @Helix Plan #ChannelName (e.g., invite @Helix Plan #general)
The bot user is added to the channel.
2. Repeat step 1 for any additional channels you want to use the integration in.