Intercept initial Ktor authenticate route
Solution 1:
Unfortunately, it's not possible to disable a redirect to authorizeUrl using the OAuthAuthenticationProvider. You can add an interceptor for the authenticate route to inject your code just before authentication (redirect) happens.
authenticate("auth-oauth-github") {
val phase = PipelinePhase("MyPhase")
insertPhaseBefore(Authentication.AuthenticatePhase, phase)
intercept(phase) {
// Do your processing here
// call.request contains data for the initial request
}
// ...
}