Passing a class object that only PostSharp can see

I'm not sure if this is possible or not.

I have a method call from client api to service api (two separate projects in two separate locations) that I want post sharp to intercept. Calls are from the client and postsharp is on the service

service.GetLogin(username)

The key here is I need to pass an authorization object that will show in the postsharp onentry method

 public class Authorization
    {
        public string client_id  { get; set; }
         public string client_secret { get; set; }
        public string access_token { get; set; }
        public string token_type { get; set; }
        public string expires_in { get; set; }
    }

var auth = new Authorization();
 auth.client_id = "xyz";
 auth.client_secret = "abc"

and in postsharp

 [Serializable]
    public class LoggingAspect : OnMethodBoundaryAspect
    {
        public override void OnEntry(MethodExecutionArgs args)
        {
           //I need the object to show up here
        }
    }

Problem: I do not want to pass this object in every single method call as I have over 1000 methods. Is there a way to attach that authorization object to each call so that postsharp can see it without doing something like this

service.GetLogin(username, auth);
service.Foo(auth)
service.Bar(auth);
service.xyz(auth);
services.abc(auth);

Can you imagine adding just this one object to over 1000 methods?