Support environment variables or secrets for PostHog integration API key

[tamerc]

Hi Mintlify team 👋

I’m adding a PostHog integration and following the documentation provided. The current setup requires including the apiKey directly in the config:

"integrations": {
  "posthog": {
    "apiKey": "YOUR_POSTHOG_PROJECT_API_KEY",
    "apiHost": "optional"
  }
}

I’d like to avoid committing the API key to source control for security reasons. Is there a way to use environment variables or a secrets manager to reference the key instead of hardcoding it?

If this isn’t currently supported, I’d love to request this as a feature — it would be really helpful for teams trying to keep secrets out of versioned configs.

Thanks for the great tool!