Barbecued Chicken Sandwich

• 6 dry rub
• 2 garlic (cloves minced)
• 2 chickens (whole)
• 1 paprka
• 1 barbecue sauce dry rub
• 350 ml cider vinegar
• 240 ml ketchup
• 240 gr coffee
• 28 gr brown sugar
• 16 gr onion (minced)