Create & validate digital certificates with PDF Generator API and Gmail

Quick overview Issue and verify digital certificates with n8n using reusable PDF Generator API templates, unique certificate IDs, an n8n Data Table registry, Gmail delivery, and a public verification endpoint. How it works Certificate creation — A POST webhook receives the candidate's name, surname, course, and email address. Unique ID validation — The workflow generates a Certification ID and checks the Data Table to prevent identifier collisions. Registry storage — Issued certificate records are persisted in an n8n Data Table for later lookup and verification. Template-based PDF generation — PDF Generator API receives JSON containing candidate, course, date, and ID values mapped to placeho

Help me set up the n8n workflow "Create & validate digital certificates with PDF Generator API and Gmail" (https://n8n.io/workflows/11886). It uses: Gmail, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.