Add chicken thighs to the Instant Pot, slow cooker, or a pot on the stove with a pack of taco seasoning (or if you don’t have any, make your own with a mix of chili powder, cumin, paprika, pepper, salt, and oregano) and 1 can of fire-roasted diced tomatoes. Cover and let cook 'til ready to shred. If you are using an Instant Pot, cook for 8 minutes.
While you are waiting for the chicken to cook, dice the onion, bell peppers, hot peppers, and drain and rinse the beans.
Sauté the red onion and bell peppers on the stove or in the instant pot.
When chicken is cooked, shred with 2 forks.
Add chicken, sautéed red onion and bell peppers, drained and rinsed beans, remaining cans of diced tomatoes, sweet corn, and the finely-diced hot peppers to the Instant Pot, slow cooker, or pot, and stir ingredients together.
Cook in the Instant Pot for 5 minutes, slow cooker for 4-6 hours, or bring to simmer on the stove for about 30 minutes.