can [:gpx_files], User if scope?(token, :read_gpx)
can [:index, :show], UserPreference if scope?(token, :read_prefs)
can [:update, :update_all, :destroy], UserPreference if scope?(token, :write_prefs)
can [:gpx_files], User if scope?(token, :read_gpx)
can [:index, :show], UserPreference if scope?(token, :read_prefs)
can [:update, :update_all, :destroy], UserPreference if scope?(token, :write_prefs)