Upload an Apple Pay merchant identity certificate

To support Apple Pay on your site, you must upload a merchant identity certificate.

This section applies to Open Storefront Framework (OSF) and Storefront Classic.

Complete the following steps:

Create the Apple Pay Merchant Identity Certificate, as described on this page:
```
https://developer.apple.com/reference/applepayjs/
```
The name of the file is as follows:

apple-developer-merchantid-domain-association
Use the createFolder endpoint to create a subfolder of /thirdparty named /.well-known.
Use the doFileSegmentUpload endpoint to upload the file.
Publish your changes to the production environment.
View the file in your browser to verify that it was uploaded correctly. For example, if your site is www.example.com, the file has this URL:
```
https://www.example.com/.well-known/apple-developer-merchantid-domain-association
```