Authorization to plugins registry

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
OpenSearch 2.18.0
OpenSearch operator 2.6.0

Describe the issue:
I deploy OpenSearch cluster by means of operator and I want to install some additional plugins as described here. But plugins are located at private registry. The question is how can I provide authorization stuff to http requests downloading these plugins?

Configuration:

  general:
    pluginsList: ["https://private-registry/plugin-x.y.z.zip"]