Hello,

is it a way to add a variable to the url that is sent to the oidc provider ?
I successfully use traefik-forward-auth with microsoft ADFS but i'm not able to use authorization from ADFS :

ADFS can be configured with two steps :

• first step : validate authentication with a callback identifier and authorize connection. This step is ok

url : ?client_id=&redirect_uri=https%3A%2F%2Fservice.domain.tld%2F_oauth&response_type=code&scope=openid+profile+email&state=%3Aoidc%3Ahttps%3A%2F%2Fservice.domain.tld%2F#/

• second step : allows to authorize (or not) for a specified group, mfa, ...
  for that it's necessary to add a new variable in url :

?client_id=&redirect_uri=https%3A%2F%2Fservice.domain.tld%2F_oauth&response_type=code&scope=openid+profile+email&state=%3Aoidc%3Ahttps%3A%2F%2Fservice.domain.tld%2F#/&resource=

In my case, I would add resource=service.domain.tld in the constructed url