Allows for custom handling of the call to the Authorization Server's Introspection endpoint.
Inheritance: Microsoft.AspNetCore.Authentication.BaseContext
 /// <summary>
 /// Invoked when a token is to be sent to the authorization server for introspection.
 /// </summary>
 public virtual Task RequestTokenIntrospection(RequestTokenIntrospectionContext context) => OnRequestTokenIntrospection(context);