{
  "id": "uuid", // Unique identifier
  "app_id": "uuid", // Scute App id
  "app_user_id": "uuid", // User id
  "status": { "pending", "failed", "verified", "cancelled", "expired" },
  "channel": { "sms", "email", "metafield", "user_identifier" }, // Verification channel
  "created_at": "datetime",
  "to_user_id": "uuid", // Recipient user id
  "metadata": {}, // Channel-specific data (e.g., new_identifier, identifier_type)
  "cached_code": "string", // OTP code for metafield/user_identifier channels
  "attemtps": [ // maxAttempts can be set at application settings
    {
        "id": "uuid", // attempt id
        "verified_at": "datetime|null", // if verified
        "created_at": "datetime", // 
        "data": {}, // attached data (analytics)
        "magic_link_id": "uuid" // if attached (email channel only)
    },
    ...
  ]
}