Invoices from Gmail to Drive and Google Sheets

Attachments Gmail to Drive and Google Sheets Description Automatically process invoice emails by saving attachments to Google Drive and extracting key invoice data to Google Sheets using AI. This workflow monitors your Gmail for unread emails with attachments, saves PDFs to a specified Google Drive folder, and uses OpenAI's GPT-4o to extract invoice details (date, description, amount) into a structured spreadsheet. Use cases Invoice Management: Automatically organize and track invoices received via email Financial Record Keeping: Maintain a structured database of all invoice information Document Organization: Keep digital copies of invoices organized in Google Drive Automated Data Entry: Eli

Help me set up the n8n workflow "Invoices from Gmail to Drive and Google Sheets" (https://n8n.io/workflows/3016). It uses: Google Sheets, HTTP Request, Google Drive, Gmail, Basic LLM Chain, OpenAI Model, Structured Output Parser. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.