Get current file classes used in classification

curl --request GET \
  --url https://app.herondata.io/api/users/file_classes \
  --header 'x-api-key: <api-key>'

[
  {
    "description": "<string>",
    "display_name": "<string>",
    "grouping": "<string>",
    "name": "<string>"
  }
]