input: Write a python function to create a Customer object and verify its attributes.
  assert create_customer('John Doe', 'john.doe@example.com', '1234567890').name == 'John Doe'
  assert create_customer('John Doe', 'john.doe@example.com', '1234567890').email == 'john.doe@example.com'
  assert create_customer('John Doe', 'john.doe@example.com', '1234567890').phone == '1234567890'
output: def create_customer(name, email, phone):
      class Customer:
          def __init__(self, name, email, phone):
              self.name = name
              self.email = email
              self.phone = phone
  
      return Customer(name, email, phone)