Hi @ruthvicsd,
thanks for your question.
If you create a user in Kibana, they are created as an Elasticsearch user. How these are persisted depends on your Elasticsearch settings, the default is the native realm.
There is no built-in way to transfer the users, the easiest way is to use the APIs https://www.elastic.co/guide/en/x-pack/current/security-api-users.html
https://www.elastic.co/guide/en/x-pack/current/security-api-roles.html as explained in these slightly outdated answer Export/Import users/roles from Native User Authentication?