Config warning (username and password)

Configuration
1

I get this error on my hassio (rpi3)

Your configuration contains extra keys that the platform does not support.

Please remove [username], [password]. See line 26

On my line 26 is device tracker for linksys. If I remove username and password, how hassio can conect to router to see what users are connected?

device_tracker:
  - platform: linksys_smart
    host: 192.168.1.1
    username: admin
    password: xxxxx
    new_device_defaults:
      track_new_devices: true
      hide_if_away: false
      
  - platform: bluetooth_tracker
2

Weird. The documentation doesn’t indicate you need any of that.