Config file for two different authentication modes

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We use Apachi as a proxy for our back-end services which are running on the different ports on the server. It redirects url/path request to localhost:port.
For all of our back-end service, we need just a valid user which can be authenticated by client-id and secret (machine-to-machine call) except one service that is a sigle-page webapp. For this webapp, we need to redirect user to the Okta login page and give back the user info provided in the HTTP header to the application. How we can create a config file that satisfied our need?