POST

//Define the HTTP POST method to create contact
    @HttpPost 
    global static Contact createContact(String contactFirstName, String contactLastName) {
        Contact con = new Contact(
            FirstName = contactFirstName,
            LastName = contactLastName
        );
    
        try {
            insert con;
        } catch (Exception e) {
            // Handle exception during contact creation or sending
            System.debug('Error: ' + e.getMessage());
        }
    
        return con;
    }