Pulled Chicken Sandwiches

My friend Sarah sent this to me and I immidiately fell in love!!! Thanks buddy!

Ingredients:

Chicken:
2 tablespoons dark brown sugar
1 teaspoon paprika
1 teaspoon chili powder
3/4 teaspoon ground cumin
1/2 teaspoon ground chipotle Chile pepper
1/2 teaspoon salt
1/4 teaspoon ground ginger
2 pounds skinless, boneless chicken thighs
Cooking spray

Sauce:
2 teaspoons canola oil
1/2 cup finely chopped onion
2 tablespoons dark brown sugar
1 teaspoon chili powder
1/2 teaspoon garlic powder
1/2 teaspoon dry mustard
1/4 teaspoon ground allspice
1/8 teaspoon ground red pepper
1 cup ketchup
2 tablespoons cider vinegar
1 tablespoon molasses
Remaining ingredients:
8 (2-ounce) sandwich rolls, toasted
16 hamburger dill chips

Directions:
Prepare grill.
To prepare chicken, combine first 7 ingredients in a small bowl. Rub spice mixture evenly over chicken. Place chicken on a grill rack coated with cooking spray; cover and grill 20 minutes or until a thermometer registers 180°, turning occasionally. Let stand for 5 minutes. Shred with 2 forks.
To prepare sauce, heat canola oil in a medium saucepan over medium heat. Add onion; cook for 5 minutes or until tender, stirring occasionally. Stir in 2 tablespoons sugar and next 5 ingredients (through pepper); cook 30 seconds. Stir in ketchup, vinegar, and molasses; bring to a boil. Reduce heat, and simmer 10 minutes or until slightly thickened, stirring occasionally. Stir in chicken; cook 2 minutes or until thoroughly heated.
Place about 1/3 cup chicken mixture on bottom halves of sandwich rolls; top each serving with 2 pickle chips and top roll half.