Accessing personal assets if connected through service account to Google Earth Engine

Question

I'm connecting to the Earth Engine API through a service account :
service_account = 'test-sepal-ui@sepal-ui.iam.gserviceaccount.com'
credentials = ee.ServiceAccountCredentials(service_account, 'test.json')
ee.Initialize(credentials)

but I cannot access my assets. when I try to execute :
ee.data.getAssetRoots()[0]['id']

That should give me the root folder name of my assets. Instead I get the following error :

IndexError: list index out of range

because the list is empty...
Is it a normal behaviour ? How can I access my assets ?

Pierrick Rambaud · Accepted Answer

Using a service account you cannot access directly the assets of your personnal account.
A nice trick is possible though.
Create a new folder in your assets
go to it's sharing preferences and add your service account as reader or writer of the folder

Then you can access the folder assets content via :
folder = 'projects/earthengine-legacy/assets/users/username/folder_name'
assets = ee.data.listAssets({'parent': folder})['assets']

Note
If you want to interact with the folder content you need to change the sharing parameters of its assset individually
The writer/reader sharing option of the folder does not extend to its content

Accessing personal assets if connected through service account to Google Earth Engine

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