Using the "sauté" feature, cook the onion in the oil until onion is translucent, stirring often.
Add garlic, broth, chicken, beans, green chiles, and seasonings.
Push the "cancel" button, then seal the lid (make sure the steam valve is sealed), hit "manual", and set it for 19 minutes.
Once it beeps, allow the pressure to release naturally (don't open the steam vent) which will take about 10 minutes.
Once done, shred the chicken and mix in the 1 cup of sour cream. Serve and garnish with cilantro, lime, avocado, cheese, corn chips, or whatever tickles your fancy!