drivelist | connected drives in your computer , in all major operating

Hi i am currently trying to access a json file using gson but i am having trouble reading the values when they are nested into a list, i am able to read the outer list and values but cannot read the drive values that are nested in pos

my json file looks like this

I added system drive icons (NSImage) to my list of drives

Now the app crashes in AppDelegate.swift on line 13 class AppDelegate: NSObject, NSApplicationDelegate { with Thread 1: EXC_BAD_ACCESS (code=2, address=0x7ffeef3fff48)

I know it's the images I am adding because when I replace that with text it's ok

Here is the class where I add the images.

I try to test Google Drive API from here : https://developers.google.com/drive/api/v3/reference/drives/create

But I get this error : The user does not have sufficient permissions for this file See also image below :

I don't understand why because I'm logged in with my Google Account, which admin of drive.

here is the code :

The code below is trying to grant a group fileOrganizer permission for a shared drive which I created earlier using similar code and the same service account impersonating the same user. (I've redacted the actual DRIVE_ID with a fake one)