Task: Get the value of a key from Redis

n8n workflow JSON:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[270,320],"parameters":{},"typeVersion":1},{"name":"Redis","type":"n8n-nodes-base.redis","position":[470,320],"parameters":{"key":"hello","options":{},"operation":"get"},"credentials":{"redis":"redis-docker_creds"},"typeVersion":1}],"connections":{"On clicking 'execute'":{"main":[[{"node":"Redis","type":"main","index":0}]]}}}