input: Write a python function to create a customer object and verify its attributes.
  assert create_customer("Alice", "alice@example.com", "1234567890", "123 Main St").name == "Alice"
  assert create_customer("Bob", "bob@example.com", "0987654321", "456 Elm St").email == "bob@example.com"
  assert create_customer("Charlie", "charlie@example.com", "5555555555", "789 Oak St").phone_number == "5555555555"
  assert create_customer("Dana", "dana@example.com", "6666666666", "321 Pine St").address == "321 Pine St"
output: def create_customer(name, email, phone_number, address):
      class Customer:
          def __init__(self, name, email, phone_number, address):
              self.name = name
              self.email = email
              self.phone_number = phone_number
              self.address = address
  
      return Customer(name, email, phone_number, address)