Task: Add Calendly invitees to HubSpot

n8n workflow JSON:
{"nodes":[{"name":"Calendly Trigger","type":"n8n-nodes-base.calendlyTrigger","position":[450,300],"webhookId":"7f68179c-c88c-4881-bfde-779b17eae5b5","parameters":{"events":["invitee.created"]},"credentials":{"calendlyApi":{"id":"270","name":"Calendly@n8n"}},"typeVersion":1},{"name":"Hubspot","type":"n8n-nodes-base.hubspot","position":[650,300],"parameters":{"email":"={{$json[\"payload\"][\"invitee\"][\"email\"]}}","resource":"contact","authentication":"oAuth2","additionalFields":{}},"credentials":{"hubspotOAuth2Api":{"id":"268","name":"HubSpot@Test Account"}},"typeVersion":1},{"name":"Slack","type":"n8n-nodes-base.slack","position":[850,300],"parameters":{"text":"=Hello! You have a new meeting scheduled with {{$json[\"properties\"][\"email\"][\"value\"]}} at {{new Date($node[\"Calendly Trigger\"].json[\"payload\"][\"event\"][\"invitee_start_time\"]).toLocaleString()}}","channel":"on-boarding","attachments":[],"otherOptions":{}},"credentials":{"slackApi":{"id":"239","name":"read-history"}},"typeVersion":1}],"connections":{"Hubspot":{"main":[[{"node":"Slack","type":"main","index":0}]]},"Calendly Trigger":{"main":[[{"node":"Hubspot","type":"main","index":0}]]}}}