Spray slow cooker with cooking spray.
Place chicken on the bottom of the slow cooker.
Pour garlic powder, green chilis, lime juice, taco seasoning, and water on top of chicken. Cook on low 5-6 hours or high 3-4 hours.
Shred chicken (it should shred easily.)
Mix together can of cream of chicken soup and sour cream.
Put half of the sour cream mixture on the bottom of a 9x13 casserole, and mix the other half in with the shredded chicken.
Place about 1/4 cup chicken mixture into each tortilla along with 2 tbsp shredded cheese.
Roll up tortilla and place seam side down in casserole dish.
Repeat again with all the tortillas.
Pour enchilada sauce over the entire casserole and then cover with remaining cheese.
Top with green onions and sliced olives.
Cover with aluminum foil and bake at 350 for 25 minutes. Remove foil and bake an additional five minutes.
Enjoy!