Send custom params on login with user and password

@osvald01 Unfortunately, you still haven’t provided me with enough data like to be able to provide a customized suggestion. So, I’ll go a bit more generic here.

You should do either one of two things:

  1. This value should be enriched in the token (Create Custom Claims), or, on the other hand
  2. The callback URL should be handle this situation within the application and without involving Auth0.