Is your feature request related to a problem? Please describe.
Instead of using normal user+password authentication I would like to have an never expiring API key as Elasticsearch also offers.
https://www.elastic.co/guide/en/elasticsearch/reference/7.16/security-api-create-api-key.html
Currently I have not found any way to generate such a key as the security plugin does not have such an option yet:
https://opensearch.org/docs/latest/security-plugin/access-control/api/

Describe the solution you'd like
It would be great to have an Elasticsearch compatible API for generating API-keys