Event ticketing backend: auto QR tickets with Google Sheets & Gmail

Ticketing Backend automates registration, QR-ticket generation, email delivery, and check-in validation using Google Sheets, Gmail, and a webhook scanner — reducing manual ticket prep from ~3 hours to under 5 minutes for 200 attendees. Last updated: September 2026. Why Use This Workflow? Time Savings: Automates ticket generation & delivery. reduces manual processing for 200 attendees from ~3 hours to <5 minutes. Cost Reduction: Removes dependency on paid ticketing platforms for basic events — save up to $150–$300/month for small organizations. Error Prevention: Single-source truth in Google Sheets with QR-based check-in reduces double-checkin and human errors by >90%. Scalability: Runs

Help me set up the n8n workflow "Event ticketing backend: auto QR tickets with Google Sheets & Gmail" (https://n8n.io/workflows/9280). It uses: Google Sheets, HTTP Request, Gmail, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.