Mix all ingredients, except chicken, in the bowl of your slow cooker.
Now add in raw chicken breasts, making sure they are submerged in the liquid.
Cook on low for 5-6 hours or low or on high for 2-3 hours.
Remove chicken and shred with forks. Stir soup (the cream cheese will look separated at first, but just keep mixing until completely incorporated.) Add chicken back in and serve.