I haven't used GitHub much, but I'm trying to add "login-and-pay-with-Amazon" to my site: https://github.com/amzn/login-and-pay-with-amazon-sdk-php?ld=NSGoogle2 I've downloaded and unzipped, but I'm not sure if I upload the whole folder as-is, named "login-and-pay-with-amazon-sdk-php-master", or what? Any help will be appreciated.
Did you read the instructions on the Github-page, and on this link: https://amzn.github.io/login-and-pay-with-amazon-sdk-samples/