NIFI how to access sensitive information through kubernetes secret

[#1]

I have api username and password which is stored in secret now i need to access them in invoke http processor through environment variable but i was unable to access because the fields doesn't allow expression language. how do i access these values from secret?

[#2]

@Santosh4013, Welcome to our community! To help you get the best possible answer, I have tagged in our NiFi experts  @MattWho @SAMSAL @cotopaul @TimothySpann who may be able to assist you further.

Please feel free to provide any additional information or details about your query, and we hope that you will find a satisfactory solution to your question.

[#3]

Team,
I need a quick solution for this problem, as I've been stuck with it for some time now.
@VidyaSargur 

[#4]

InvokeHTTP does not provide a way to read user Authentication in the form of secrets from files or environment variables.