Extract & Classify Invoices & Receipts with Gmail, OpenAI and Google Drive

Who is it for? Anyone who wants to automatically aggregate their invoices or receipts. Main beneficiaries: small business owners and freelancers. How it works Creates a folder in Google Drive for uploading invoices and receipts. Responds (Webhook response) with URL to the created folder. Gets all emails with attachments from a Gmail mailbox. (Optional) Filters emails, e.g. exclude emails sent to specific address. Filters only PDF attachments. Classifies all PDF attachment contents with an AI model (is it a receipt or an invoice?). Uploads receipts and invoices to the created Google Drive folder and optionally sends an email with the attachments to, e.g., your accountant. Pre-conditions/Requi

Help me set up the n8n workflow "Extract & Classify Invoices & Receipts with Gmail, OpenAI and Google Drive" (https://n8n.io/workflows/3719). It uses: Google Drive, Gmail, Code, OpenAI. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.