input: Write a python function to create a Customer object and return its details as a dictionary.
  assert create_customer("John Doe", 30, "john.doe@example.com", "123-456-7890") == {"name": "John Doe", "age": 30, "emailid": "john.doe@example.com", "phone_number": "123-456-7890"}
  assert create_customer("Jane Smith", 25, "jane.smith@example.com", "098-765-4321") == {"name": "Jane Smith", "age": 25, "emailid": "jane.smith@example.com", "phone_number": "098-765-4321"}
  assert create_customer("Alice Johnson", 40, "alice.johnson@example.com", "567-890-1234") == {"name": "Alice Johnson", "age": 40, "emailid": "alice.johnson@example.com", "phone_number": "567-890-1234"}
output: def create_customer(name, age, emailid, phone_number):
      return {
          "name": name,
          "age": age,
          "emailid": emailid,
          "phone_number": phone_number
      }