curl --request GET \
  --url https://api.example.com/api/v2/categories/tree \
  --header 'x-api-key: <api-key>'

{
  "success": true,
  "message": "Category tree fetched successfully.",
  "data": [
    {
      "uuid": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
      "name": "Bags",
      "types": [
        {
          "uuid": "c3d4e5f6-a7b8-9012-cdef-345678901234",
          "name": "Tote Bags",
          "brands": [
            {
              "uuid": "e5f6a7b8-c9d0-1234-efab-567890123456",
              "name": "Louis Vuitton",
              "models": [
                {
                  "uuid": "f6a7b8c9-d0e1-2345-fabc-678901234567",
                  "name": "Neverfull MM"
                },
                {
                  "uuid": "a7b8c9d0-e1f2-3456-abcd-789012345678",
                  "name": "Neverfull GM"
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "uuid": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
      "name": "Watches",
      "types": [
        {
          "uuid": "d4e5f6a7-b8c9-0123-defa-456789012345",
          "name": "Luxury Watches",
          "brands": [
            {
              "uuid": "b8c9d0e1-f2a3-4567-bcde-890123456789",
              "name": "Rolex",
              "models": [
                {
                  "uuid": "c9d0e1f2-a3b4-5678-cdef-901234567890",
                  "name": "Submariner"
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}