Spray slow cooker with non-stick cooking spray. Place chicken breasts inside slow cooker.
Add all the remaining ingredients on top of the chicken. Place the lid on top and cook on low for 6-7 hours.
After chicken is done cooking, remove chicken from crock pot and place on a cutting board. Using two forks, shred chicken and return to slow cooker. Return chicken to slow cooker and mix with remaining liquid.
Serve on corn tortillas with desired toppings.
Notes
Keep in an airtight container in the fridge for up to 5 days.