By default you ask your users for these permissions, if you do not want to get them from the Snap Store.
That is, create your snap package and publish it on the Snap Store. Do not request to pre-approve any permissions.
Arrange with your users to enable those permissions on demand.
That is, create your snap package and publish it on the Snap Store. Do not request to pre-approve any permissions. Arrange with your users to enable those permissions on demand.