Load the slow cooker: Add chicken, beans, corn, green chilies, onion, broth, garlic powder, cumin, oregano, plus a pinch of salt and pepper. Stir gently to combine.
1½ pounds boneless, 1 can, 1 can, 1 can, 1 small onion, 3 cups chicken broth, 1 teaspoon garlic powder, 1 teaspoon cumin, Salt and pepper to taste, ½ teaspoon dried oregano