createCustomer method
Create a new customer account.
Registers a new customer in the Magento system with the provided information.
email the customer's email address (must be unique)
password the customer's password
firstName the customer's first name
lastName the customer's last name
Returns a map containing the created customer data, or null if creation failed.
Implementation
Future<Map<String, dynamic>?> createCustomer({
required String email,
required String password,
required String firstName,
required String lastName,
}) {
throw UnimplementedError('createCustomer() has not been implemented.');
}