Create an user Moodle when the payment is completed in WooComerce

wc-create-user-moodle.php

<?php

/**
 * Payment Complete in WC
 */
add_action( 'woocommerce_payment_complete', 'createMoodleUser' );

/**
 * Create Moodle User
 * @param int $orderID
 * @return void
 * @see wp_remote_post
 */
function createMoodleUser( int $orderID ): void {
	
	// Get WC Order
	$order = wc_get_order( $orderID );
	
	// Request Moodle User
	$moodleUser = [
		'email'        => $order->get_billing_email(),
		'username'     => $order->get_billing_email(),
		'password'     => wp_generate_password( 12, false ),
		'firstname'    => $order->get_billing_first_name(),
		'lastname'     => $order->get_billing_last_name(),
		'customfields' => [
			[
				'type'  => 'rol',
				'value' => 'student'
			]
		],
	];
	
	if ( $order->meta_exists( 'dni' ) ) {
		$moodleUser['customfields'][] = [
			'type'  => 'DNI',
			'value' => $order->get_meta( 'dni' )
		];
	}
	
	// Request Moodle
	$moodleApiURL = 'https://tuwebmoodle.com/webservice/rest/server.php';
	$moodleToken  = '52fcc38e*******************';
	
	$response = wp_remote_post( $moodleApiURL, [
		'timeout' => 10,
		'body'    => [
			'wstoken'            => $moodleToken,
			'wsfunction'         => 'core_user_create_users',
			'moodlewsrestformat' => 'json',
			'users'              => [ $moodleUser ]
		]
	] );
	
	// Response validation
	if ( is_wp_error( $response ) ) {
		$order->add_order_note(
			sprintf(
				esc_html__( 'Moodle user creation failed: %s', 'letsgo' ),
				$response->get_error_message()
			)
		);
		
		return;
	}
	
	$responseBody = wp_remote_retrieve_body( $response );
	$responseData = json_decode( $responseBody, true );
	
	if ( ! empty( $responseData['exception'] ) ) {
		$order->add_order_note(
			sprintf(
				esc_html__( 'Moodle user creation exception (%s) : %s', 'letsgo' ),
				$responseData['exception'],
				$responseData['message']
			)
		);
		return;
	}
	
	// Get the first element
	$moodleUserCreated = current( $responseData );
	
	// Success
	$order->add_order_note(
		sprintf(
			esc_html__( 'Moodle user creation success: %s', 'letsgo' ),
			$moodleUserCreated['id']
		)
	);
}