WhatsApp initial configuration for Slack Step by step instruction 1. Install our app. Use the button " Add to Slack " on the website https://www.chatarchitect.com/product/whatsapp-and-slack-integration   2. Press " Allow " 2. Now you need to add the app to the channel where you want to use Go to the " Apps "  3. Choose " ChatArchitect.com for WhatsApp " - > " App details " - > " View app details " 4. Press " Add this app to a channel " and choose a channel that you want to use and press " Add "  5. Now you need to open this channel and press " Install " button and fill in your APP ID and APP SECRET 5. Write to your WhatsApp Business API number from your personal WhatsApp  Done. You can now use our WhatsApp Business API integration in your Slack.