curl --request GET \
  --url https://api.cashful.africa/api/canary/customers \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": "customer_789",
      "merchantId": "merchant_456",
      "phoneNumber": "+27821234567",
      "email": "john.doe@example.com",
      "name": "John Doe",
      "metadata": {
        "source": "web",
        "referralCode": "FRIEND123"
      },
      "createdAt": "2025-01-15T10:30:00.000Z",
      "updatedAt": "2025-01-15T10:30:00.000Z"
    }
  ],
  "pagination": {
    "limit": 50,
    "offset": 0,
    "total": 150,
    "hasMore": true
  }
}