Repeater cannot be added if mesh connected to another repeater
**Describe the bug**
The Plugin throws an error when trying to add a repeater device that is wifi connected to another repeater which is already successfully added to Homebridge.

**To Reproduce**
1. wps connect repeater to another repeater
2. Mesh connect repeater to the mesh master (FritzBox)
3. Try to add it to Homebridge

**Expected behavior**
Should be addable to Homebridge

**Screenshots**
Log:
[1/15/2022, 9:03:46 AM] [FritzPlatform] Repeater OG (repeater): Adding Switch service
[1/15/2022, 9:03:50 AM] [FritzPlatform] Repeater OG (repeater): An error occured during getting state!
[1/15/2022, 9:03:50 AM] [FritzPlatform] Error: Unauthorized
    at Object.exports.request (/usr/lib/node_modules/homebridge-fritz-platform/node_modules/@seydx/fritzbox/lib/request.js:78:21)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at exports.requestXml (/usr/lib/node_modules/homebridge-fritz-platform/node_modules/@seydx/fritzbox/lib/request.js:230:20)
    at Service.execAction (/usr/lib/node_modules/homebridge-fritz-platform/node_modules/@seydx/fritzbox/lib/service.js:133:20)
    at Handler.get (/usr/lib/node_modules/homebridge-fritz-platform/src/accessories/router/router.handler.js:165:28)
    at Handler.poll (/usr/lib/node_modules/homebridge-fritz-platform/src/accessories/router/router.handler.js:979:11) {
  title: 'Invalid Response',
  code: 401,
  soap: {},
  url: 'https://foobar:foobar!@1.2.3.4:49443/upnp/control/wlanconfig1'
}

**Desktop (please complete the following information):**
 - OS: Ubuntu 20.04 on RaspPi
 - node.js latest
 - homebridge: latest
 - fritz-platform latest, fresh install (no update)

**Additional context**
Many thanks for this superb plugin. Keep up the good work!
