Crockpot BBQ Beer Pulled Pork Tacos with Crispy Onion Straws and Mango Salsa

• 1 (3.5-pound) pork shoulder roast (mine was bone-in)
• 1 tablespoon onion powder
• 1 tablespoon smoked paprika
• 1 teaspoon garlic powder
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 12 ounces of beer
• 32 ounces of barbecue sauce + additional for drizzling
• 12 small flour or corn tortillas
• 4-6 ounces freshly grated cheddar cheese
• 1 batch of crispy onion straws

Mango Salsa

• 1 mango, peeled and chopped
• 1/4 red onion, finely diced
• 1/2 jalapeño, finely diced
• 1 bunch of cilantro, chopped
• the juice of 1 lime
• 1/4 teaspoon salt
• 1/4 teaspoon pepper