ZafClient request custom HTTP header
I have custom private app and using Zafclient to fetch data from external API to show on ticket side bar. When I include a custom HTTP header like ZENDESK_AUTH_TOKEN, that header is not being sent to the external API (I have access to external API, so I can see request metadata). However if I add Authorization HTTP header, I can see that header is sent. Is there restriction on which headers can be sent to external API via Zafclient and Zendesk proxy? I am using secure settings with placeholder {{setting.myParam}} and Zendesk proxy to replace these values, in case this helps.
