Task: Get all contacts from Keap

n8n workflow JSON:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Keap","type":"n8n-nodes-base.keap","position":[450,300],"parameters":{"options":{},"resource":"contact","operation":"getAll"},"credentials":{"keapOAuth2Api":"keap_creds"},"typeVersion":1}],"connections":{"On clicking 'execute'":{"main":[[{"node":"Keap","type":"main","index":0}]]}}}