Task: Get all posts from Wordpress

n8n workflow JSON:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[250,300],"parameters":{},"typeVersion":1},{"name":"Wordpress","type":"n8n-nodes-base.wordpress","position":[450,300],"parameters":{"options":{},"operation":"getAll"},"credentials":{"wordpressApi":"wp_creds"},"typeVersion":1}],"connections":{"On clicking 'execute'":{"main":[[{"node":"Wordpress","type":"main","index":0}]]}}}