Handle GDPR data deletion requests with Slack

This workflow automatically deletes user data from different apps/services when a specific slash command is issued in Slack. Watch this talk and demo to learn more about this use case. The demo uses Slack, but Mattermost is Slack-compatible, so you can also connect Mattermost in this workflow. Prerequisites Accounts and credentials for the apps/services you want to use. Some basic knowledge of JavaScript. Nodes Webhook node triggers the workflow when a Slack slash command is issued. IF nodes confirm Slack's verification token and verify that the data has the expected format. Set node simplifies the payload. Switch node chooses the correct path for the operation to perform. Respond to Webhook

Help me set up the n8n workflow "Handle GDPR data deletion requests with Slack" (https://n8n.io/workflows/1455). It uses: Airtable, HTTP Request, Crypto. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.