Hikvision camera photo in iOS notification

First i used an updated pushover.py to be able to send attachments, see here; https://community.home-assistant.io/t/pushing-images-with-pushover-3-0/40667/17?u=bigben

Than I use this:

- alias: Bezoeker
  trigger:
    platform: state
    entity_id: binary_sensor.voordeurh_line_crossing
    to: 'on'
  action:
    - service: notify.pushover_ha
      data_template:
        message: 'Bezoeker om {{now().strftime("%H:%M %d-%m-%Y")}}'
      data:
        title: "Home Assistant"
        data:
          priority: 0
          sound: intermission
          file:
            url: http://username:password@ip:port/Streaming/channels/1/picture