input: Write a python function to create a User object and verify its attributes.
  assert create_user("john_doe", "password123", "john@example.com").username == "john_doe"
  assert create_user("john_doe", "password123", "john@example.com").password == "password123"
  assert create_user("john_doe", "password123", "john@example.com").email == "john@example.com"
  assert create_user("jane_doe", "securepass", "jane@example.com").username == "jane_doe"
  assert create_user("jane_doe", "securepass", "jane@example.com").password == "securepass"
  assert create_user("jane_doe", "securepass", "jane@example.com").email == "jane@example.com"
output: class User:
      def __init__(self, username, password, email):
          self.username = username
          self.password = password
          self.email = email
  
  def create_user(username, password, email):
      return User(username, password, email)