Crockpot Pulled Chicken

Name: Crockpot Pulled Chicken
Ingredients: 2 chicken breasts; 1 white onion; 33 fl oz chicken stock; 2 bay leaves; 3 garlic cloves; 1 teaspoon cilantro seeds; 1 teaspoon black peppercorns; 2 cups canned tomatoes pulsed in the food processor.; ½ cup apple cider vinegar; ¼ cup brown sugar; 2 teaspoons honey; 1 teaspoon Worcestershire sauce; 1 teaspoon garlic powder; 1 teaspoon onion powder; 1 teaspoon Italian herbs (oregano, thyme, rosemary, basil, and sage); ½ teaspoon chili flakes (optional but nice); 2 black cardamom pods; Salt to taste