How to access account with Mint

That isn't currently supported (for Mint or any other financial service or app such as Quicken). The closest thing was a recently announced ability to export data in csv format. See below from Manage your Apple Card account - Apple Support

You can export or download transactions from a previous month as

a .CSV file to use with third-party financial apps and programs that

support this file format.

See how to export or download your Apple Card transactions.

This is ridiculous! If I can't integrate it with the rest of my financial info I won't use it!

Very disappointing!