OAuth 2.0 Capture Redirect

Hello,

I am currently trying to implement OAuth 2.0 into my Windows application to access a third party API. It requires me to open a Webpage for the user to login and then redirects to a custom URL with the access token in it.

I first tried to get it wokring over UnityWebRequest, but that does not seem to work when the user has to manually enter his/her login details on the third party website before the redirect (or at least it never opened the browser in my initial tests).

So my current plan would be to have that redirect URL beeing a local php script that stores the access token in a seperate file, which I could then read in Unity again. Unfortunately, my php skills are not existent, so I was wondering whether someone could help me out :)