List subscriptions

curl -X GET "https://api.live.paisr.tech/v2/subscriptions" \
  -H "Authorization: Bearer <access_token>" \
  -H "User-Agent: MyApp/1.0" \
  -H "Content-Type: application/json"

{
  "success": true,
  "data": {
    "subscriptions": [
      {
        "id": "sub_123456",
        "customer": {
          "id": "cus_123456",
          "name": "Jane Smith",
          "email": "jane@example.com",
          "billing_details": null,
          "shipping_details": null
        },
        "payment_method": {
          "id": "cpm_123456",
          "type": "wallet",
          "provider": "Paisr Pay"
        },
        "status": "active",
        "currency": "SRD",
        "auto_renew": true,
        "billing_interval": 30,
        "billing_start": "2024-01-15T10:30:00Z",
        "billing_end": "2024-01-15T10:30:00Z",
        "last_renew_at": "2024-01-15T10:30:00Z",
        "next_renew_at": "2024-01-15T10:30:00Z",
        "created_at": "2024-01-15T10:30:00Z"
      }
    ]
  }
}