Open AI agent SDK set custom request headers and SSL certs

We have model deployed behind API gateway and I exported API key and base url environment variables.

Step 1 - Setup API Key and Base URL to model deployed behind API gateway

export OPENAI_API_KEY=<CUSTOM API KEY> export OPENAI_API_BASE`=

Step 2 - Setup SSL certs and request headers

Step 3 - Create a agent
from agents import Agent, Runner

agent = Agent(name=“Assistant”, instructions=“You are a helpful assistant”)

result = Runner.run_sync(agent, “Write a haiku about recursion in programming.”)
print(result.final_output)

How to pass custom request headers, SSL certs to open AI agent SDK ?