Not receiving client headers in google cloud function

I am using Google cloud functions, and has deployed and had been using 2nd gen functions with flask applications. I am using Hasura actions to trigger these functions. Recently after I updated and deployed my code, it started showing headers that I passed from Hasura actions as None. All cloud functions other than that which I updated was getting the headers. Has anyone got this issue of not receiving the headers that was sent?

To confirm, I updated one more cloud function and that too started acting the same way. I have logged all the headers that I am receiving in the cloud functions and confirmed that it was not any spelling mistakes or that kind of errors.

I am using python version 3.11 and cloud function 2nd gen.

import json

@functions_framework.http
def main(request):
    try:
        action_secret = request.headers.get("action_secret")

        if action_secret != os.environ.get("action_secret"):
            logging.error("Unauthorized access")
            return json.dumps(
                {"err_msg": "You are not authorized to perform this action"}
            )
    except Exception as e:
        print(e) # I get the error log as action_secret is not in request.headers

Update:

• I had been testing this is in multiple ways and found out that it is the issue of Hasura not sending the headers.

Found out that the error was caused due to an underscore in the hasura action client headers. The variable I used was 'action_secret' and when I modified that into 'actionsecret', the cloud functions started working normally.