How do I use GPT reverse proxy with WP Automatic?

I need to replace the openai api url "api.openai.com" to my reverse proxy url in the plugin but I can't find the string "api.openai.com".

I have used Notepad++ to check thru the plugin files but no luck.. 0 result found.

Anyone here found a way to do that? Or any other autoblogging plugin that support the feature.

What do you use to create reverse proxy?