Slow Cooker Chicken Burrito Bowls

Name: Slow Cooker Chicken Burrito Bowls
Ingredients: 1 to 1 1/2 pounds boneless skinless chicken breasts, chicken thighs, or a mix; 1 (14.5-ounce) can diced tomatoes; 1 cup low-sodium chicken broth, plus more as needed; 2 teaspoons chili powder; 2 teaspoons salt; 1 teaspoon ground cumin; 1 (15-ounce) can black beans, drained and rinsed; 1 cup uncooked brown rice; 1 cup frozen corn kernels; Optional toppings: shredded cheese, chopped cilantro, sour cream, diced avocado, salsa, hot sauce, diced green onions, shredded lettuce