Extracting redis keys data

Elastic Stack Beats
1

I can Extracting redis info.
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I want to Extracting redis keys

2

I see we have a key param for logstash: https://www.elastic.co/guide/en/logstash/current/plugins-inputs-redis.html#plugins-inputs-redis-key
I don't see one for filebeat: https://www.elastic.co/guide/en/beats/filebeat/master/filebeat-input-redis.html

other ref: