1. Turn the Instant Pot to saute mode. When hot, add 1 tablespoon olive oil to the pot. Season the chicken with salt and pepper. Add the chicken to the pot skin side down and cook for about 2 minutes, or until skin is brown and crispy. Turn over and cook for another 2 minutes.
2. Change the Instant Pot setting to manual high pressure. Add the remaining ingredients and mix together with the chicken. Put the lid on the top, lock and seal it.
3. Set the timer for 12 minutes and cook. When time is up, let the pot manually release for 5 minutes.
4. After 5 minutes, open the pot. Use two forks to shred the chicken. Remove the chicken bones and discard.
5. Add the chicken and sauce to individual serving containers. Top with green onions and cilantro if desired.