can [:create, :update, :destroy], Trace if scope?(token, :write_gpx)
can :details, User if scope?(token, :read_prefs)
- can :gpx_files, User if scope?(token, :read_gpx)
-
can :read, UserPreference if scope?(token, :read_prefs)
can [:update, :update_all, :destroy], UserPreference if scope?(token, :write_prefs)