Slow Cooker Shrimp Sausage Chowder

Name: Slow Cooker Shrimp Sausage Chowder
Ingredients: One 60-ounce frozen raw medium (41-60) shrimp, peeled, deveined and tails removed; One 12-ounce package smoked fully cooked andouille sausages, diced medium; 16 ounces frozen fire roasted corn; 1 pound frozen diced potatoes with peppers and onions; 4 cups chicken stock; One 7-ounce can salsa verde; One 4-ounce can green chiles; 1 tablespoon Cajun seasoning; 1/2 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 5 scallions, thin sliced, whites and greens separated