Masking secrets in the config for benthos streams

[Manognya-9491]

I am trying to generate a config via a microservice and POST it to benthos streams. I need to get back response constructed as part of config to my service hence I am using http_server input and sync_response output. The issue is since the POST call is http, managing secrets becomes challenging. The way I could think of now is to have a https call.
Is it possible to configure this for benthos streams I mean enabling TLS using key and cert file fields of http_server input? How would the post call differ in that case?
I am also open to any other suggestions other than the above approach.
Note: I can have multiple streams running and multiple secrets to manage for that respective streams