How to create an API for read?

I need api for user use to search data.

https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-create-api-key.html#security-api-create-api-key
I create an API and then test it by Postman but its doesnt work.
Capture

It work, when I test API(admin) from "Deployments > xxx > Elasticsearch > API console"
by Postman.