Firebase credentials file on maui macos app

Good morning. I am developing a net maui app but I am experiencing the following problem: On windows it works perfectly, on mac I can not connect to the database as I can not trace the file with firebase credentials.

string basePath = AppDomain.CurrentDomain.BaseDirectory;
string credentialsPath = Path.Combine(basePath, "giogo-dee69-firebase-adminsdk-fsksp-1cf7a95106.json");

Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", credentialsPath);

       try
        {
            FirestoreDb db = FirestoreDb.Create("giogo-dee69");
		DocumentReference coll = db.Collection("NomeCollezione").Document("Capoccione");

        Modello DaInserire = new Modello();

        DaInserire.Username = "Picciotto";
        DaInserire.NumeroCapelli = 19;

	await coll.SetAsync(DaInserire);

        }
        catch (Exception ex)
        {
            Console.WriteLine("Errore di connessione a Firestore: " + ex.Message);
        }

The result:
TestFirebase[1325:25275] Errore di connessione a Firestore: Error reading credential file from location /Users/*************/Projects/TestFirebase/TestFirebase/bin/Debug/net7.0-maccatalyst/maccatalyst-x64/TestFirebase.app/Contents/MonoBundle/giogo-dee69-firebase-adminsdk-fsksp-1cf7a95106.json: Could not find file '/Users/**************/Projects/TestFirebase/TestFirebase/bin/Debug/net7.0-maccatalyst/maccatalyst-x64/TestFirebase.app/Contents/MonoBundle/giogo-dee69-firebase-adminsdk-fsksp-1cf7a95106.json'.

TestFirebase[1325:25275] Please check the value of the Environment Variable GOOGLE_APPLICATION_CREDENTIALS.

I don't understand if it does not copy the file at the time of compilation (with Windows it does and macOS does not) or if it is wrong way to find the folder with the file. Thanks to anyone who can help me.

That's similar to this issue: SetEnvironmentVariable for GOOGLE_APPLICATION_CREDENTIALS works on windows but give error on android. and mattleibow's comment gives a solution on cross platform which might be help.

First, set the credentials file in Raw sub-folder and set property "MauiAsset" and "copy if new".

Then read the file at runtime and store in a temp folder or any other folder:

//new path we will copy the file to. 
var newPath = Path.Combine(FileSystem.CacheDirectory, "giogo-dee69-firebase-adminsdk-fsksp-1cf7a95106.json");

// read the file in Resource/Raw in this way
using var json = await FileSystem.OpenAppPackageFileAsync("giogo-dee69-firebase-adminsdk-fsksp-1cf7a95106.json");
//create the new path and copy the original json file here
using var dest = File.Create(newPath);
await json.CopyToAsync(dest);

Environment.SetEnvironmentVariable("GOOGLE_APPLICATION_CREDENTIALS", newPath);

Also, use dest.Close(); as MahmoudAlEssawi comment.

Then you may find the credential file in new path and we could read it.

Hope it works!