In a large bowl combine the greek yogurt, butter, chicken broth, and half & half.Stir until well combined.Sprinkle in the seasoning salt, black pepper, onion powder, garlic powder, paprika, and cayenne pepper.Stir until everything is well incorporated.Next toss the uncooked macaroni into the slow cooker.Now add the cheese in the slow cooker.Stir, then pour in the creamy mixture( greek yogurt, chicken broth, and etc..)Stir everything until well incorporated.Place the lid on the slow cooker, then set the slow cooker on low.Let cook for 3 hours.Serve and enjoy!