Facebook Token Retrieval & Management

Pre-Conditions A Facebook Developer account with an active app. Basic understanding of n8n workflows. Access to a database (optional, for storing tokens). Setup Webhook Activation: Configure the Webhook to receive user requests and process input data. Ensure the Webhook URL is correctly set in your Facebook App settings. Short-Lived Token Retrieval: Use Facebook OAuth to fetch a short-lived token from the authorization code. Long-Lived Token Conversion: Convert the short-lived token into a long-lived token (valid for ~60 days). Page Token Retrieval: Follow the provided instructions to retrieve Page Tokens for posting on managed Facebook Pages. Customizable Scopes: Edit the correctScopes arra

Help me set up the n8n workflow "Facebook Token Retrieval & Management" (https://n8n.io/workflows/2959). It uses: HTTP Request, Code. Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.