AdService AAAttribution payload async fetching

UTMCampaignLoader.swift

//This class demostates how to extract and store payload info if it's available. Compaign ID was valuable for me so that's why only it is stored.
import AdServices

actor UTMCampaignLoader {
    
    // Optional campaignID property
    var campaignID: Int?
    
    // Method to load UTM campaign asynchronously
    func loadUTMCampaign() async -> Int? {
        do {
            // Try to get the attributionToken from AAAttribution
            let attributionToken = try AAAttribution.attributionToken()
                // Create a POST request to Apple's ad services API
                var request = URLRequest(url: URL(string:"https://api-adservices.apple.com/api/v1/")!)
                request.httpMethod = "POST"
                request.setValue("text/plain", forHTTPHeaderField: "Content-Type")
                request.httpBody = Data(attributionToken.utf8)
                
                // Use async version of URLSession to fetch data
                let (data, response) = try await URLSession.shared.data(for: request)
                
                // Check if response is an HTTP response and if status code is 200
                if let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 {
                    // Parse response data
                    if let result = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any],
                       let campaignId = result["campaignId"] as? Int {
                        
                        self.campaignID = campaignId
                        print("Campaign ID:", campaignId)
                        
                        return self.campaignID
                    }
                } else {
                    // Handle non-200 status codes
                    if let httpResponse = response as? HTTPURLResponse {
                        print("Failed with status code: \(httpResponse.statusCode)")
                    } else {
                        print("Failed with unknown response")
                    }
                }
        } catch {
            print("Error:", error)
        }
        return nil
    }
}