The first row corresponds to the owner of the spreadsheet. Permissions for
other users or groups, if such exist, follow in additional rows.
A permission for a sheet includes the following information: the name for
this permission, the email of the user or group the permission refers to, the
primary role for the user, any additional roles they have, the type of user
they are, the (unique) ID of the user this permission refers to, a link back
to this permission, and the ETag of the permission.