List all files and subfiles in a bucket

I have some files stored like

BUCKET_NAME/${userId}/${groupId}/${itemId}

BUCKET_NAME/${userId}/${groupId}/${itemId}

Is there a way to list all the items stored for the user without having to loop through each

groupId

groupId

?

It would be ideal if there was single query that i could run to see everything in

BUCKET_NAME/${userId}

BUCKET_NAME/${userId}

which would display each

groupId

groupId

and all of its children