Place chopped chicken in slow cooker and add sauce, water, cumin, garlic powder and pepper. Cook on High heat for 2-3 hours.Take out 1 cup of sauce, be careful and add to blender. Blend in corn tortilla til smooth, covering the lid with a cloth so you don't burn your hands.
Add sauce, beans and cook for 45 minutes more. Transfer to a big bowl and add rest of ingredients. Enjoy..