curl -X POST "https://api.affonso.io/v1/program/groups" \
  -H "Authorization: Bearer sk_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "Premium Partners",
    "description": "High-performing affiliates with higher commissions",
    "custom_website_url": "https://partners.acme.com"
  }'

{
  "success": true,
  "data": {
    "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "name": "Premium Partners",
    "description": "High-performing affiliates with higher commissions",
    "custom_website_url": "https://partners.acme.com",
    "is_default": false,
    "created_at": "2024-06-15T14:30:00.000Z"
  }
}

{
  "success": false,
  "error": {
    "code": "PLAN_LIMIT_REACHED",
    "message": "Your Launch plan allows up to 3 groups. Upgrade to Growth for up to 5, or Elite for unlimited.",
    "current_limit": 3
  }
}