Poblano Corn Chowder With Chicken

Name: Poblano Corn Chowder With Chicken
Ingredients: 2 boneless skinless chicken breasts; 2 cups water; 4 cups frozen corn, divided; 1 cup milk; 1 tablespoon olive oil; 2 poblano chiles, seeded, diced; 1 white onion, chopped; 3 medium garlic cloves, minced; 1 teaspoon sugar; 1 teaspoon kosher salt; 1⁄2 teaspoon cayenne pepper; 1 large tomatoes, diced; 1⁄4 cup feta cheese, crumbled; cilantro, chopped (optional); avocado, slices (optional); lime slice (optional); black pepper, freshly ground