curl --request GET \
  --url https://api.heygen.com/v3/avatars \
  --header 'x-api-key: <api-key>'

{
  "data": [
    {
      "id": "<string>",
      "name": "<string>",
      "created_at": 123,
      "looks_count": 123,
      "preview_image_url": "https://files.heygen.ai/avatar/anna_preview.jpg",
      "preview_video_url": "https://files.heygen.ai/avatar/anna_preview.mp4",
      "gender": "female",
      "default_voice_id": "1bd001e7e50f421d891986aad5c8bbd2",
      "consent_status": "approved",
      "status": "completed",
      "error": {
        "code": "<string>",
        "message": "<string>"
      }
    }
  ],
  "has_more": true,
  "next_token": "<string>"
}