curl --location --request GET 'http://dev-cn.your-api-server.com/v1/files' \
--header 'Authorization: Bearer $API_KEY'                {
  "data": [
    {
      "id": "file-123",
      "bytes": 1562,
      "created_at": 1701832828,
      "filename": "xxx.pdf",
      "object": "file",
      "purpose": "knowledge-base"
    },
    {
      "id": "file-124123",
      "bytes": 183237,
      "created_at": 1702201134,
      "filename": "xxx.doc",
      "object": "file",
      "purpose": "knowledge-base"
    }
  ],
  "object": "list"
}