Thank you for your help @marnall You are correct, I did enter my elastic search information in the app but it did not pull any data. When I go thorough _Internal logs, I see some error logs that contains users like proxy and root, but I dont have any of this users in my configs nor in my database credentials and also I didnt active the proxy option in the Elasticsearch Data Integrator add-on. I could mention that I can connect to elastic database via curl from splunk server which means the connection is open.
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