Confit Chicken Club Sandwich With Chipotle Mayo

Name: Confit Chicken Club Sandwich With Chipotle Mayo
Ingredients: 3 bone-in, skin-on chicken legs; 1 cup kosher salt; 1 cup turbinado sugar; 18 ounces duck fat (a blended olive oil would work great too); 1 shallot, peeled and halved; 1 head of garlic, halved; 1 cup mayonnaise; 1/3 cup chipotle chiles in adobo; 1 teaspoon granulated sugar; 8 slices your favorite bread (I chose a Pullman loaf but a nice sourdough would work for this!); Lettuce, for serving; Sliced tomato, for serving; Sliced avocado, for serving; Cooked bacon, for serving; Sliced cheddar cheese, for serving