Get long-lived Facebook Page access tokens and subscribe Messenger webhook fields via Graph API

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Get Long-Lived Facebook Page Access Token and Subscribe Messenger Webhook Fields This n8n template automates two critical one-time setup steps required before any Facebook automation can go live: it exchanges a short-lived User Access Token for a long-lived one (~60 days), retrieves Page Access Tokens for all connected Facebook Pages, and subscribes each Page to the webhook fields your app needs — all in a single manual run. If you're building a Messenger chatbot or automating comment replies