I am setting up couchdb and elastic search on ubuntu 18.4 using a given tutorial
https://www.digitalocean.com/community/tutorials/how-to-set-up-couchdb-with-elasticsearch-on-an-ubuntu-13-10-vps

In this tutorial one has connected couchdb and elasticsearch using elasticsearch-river-couchdb but the plugin is depricated according to https://github.com/elastic/elasticsearch-river-couchdb.

and the substitute they given is
logstash couchdb changes input.

Now how to configure logstash couchdb changes input to make it work together.

Thanks