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Hello everyone!
I’m trying to setup oauth-based authorization with Discord on my Ktor app following the tutorial: <https://ktor.io/docs/oauth.html>
Everything is working fine except for one case.
If user rejects authorization request by pressing cancel (see screenshot), Discord server sends response on my callback endpoint with access_denied query parameter, like this:
```/callback?error=access_denied&amp;error_description=...```
And since my `/callback` endpoint under `authenticate` block Ktor server behaves incorrectly - essentially it runs authorization flow again (since there is no authenticated OAuth2 proncipal, user redirects back to discord authorization window).
Expected behaviour: let me handle this error and show to the user.
Any advices how to tackle this problem?