Cannot get Golang Auth Plugin to execute in OAS template

I’m migrating API definitions from legacy to OAS to utilize multi-auth, but I cannot seem to get custom Golang authentication plugins to execute.

I have since moved to running the custom auth code in a post-auth plugin just to have something working, but it would be way better to be able to use them in the auth step.

I can’t find an example of the OAS API format with a custom auth plugin that utilizes Golang. Is it still supported?