Get integrations

curl --request GET \
  --url https://api.letsway.com/v1/brands/{brandId}/integrations

{
  "items": [
    {
      "id": "integration-123",
      "brandId": "brand-456",
      "type": "opera",
      "config": {
        "setting1": true
      },
      "credential": {
        "apiKey": "secret-key"
      }
    }
  ]
}