Getting error on ghcr.io credentials

[xkalf]

i tried following instruction

services:
  watchtower:
    image: containrrr/watchtower
    command:
      - "--interval"
      - "30"
      - "--debug"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /home/ubuntu/.docker/config.json:/config.json
  app:
    image: ghcr.io/xkalf/autosync_backend:latest
    build:
      context: .
    working_dir: /app
    ports:
      - 3000:3000

docker run [...] -v <PATH_TO_HOME_DIR>/.docker/config.json:/config.json containrrr/watchtower

but watch tower can't access to my ghcr.io private credentials

here is config.json

{
	"auths": {
		"ghcr.io": {
			"auth": "<Token i hide it>"
		}
	}
}

watchtower-1  | time="2025-02-10T02:37:59Z" level=debug msg="Loaded auth credentials for user xkalf, on registry ghcr.io, from file /config.json"
watchtower-1  | time="2025-02-10T02:37:59Z" level=debug msg="Got image name: ghcr.io/xkalf/autosync_backend:latest"
watchtower-1  | time="2025-02-10T02:37:59Z" level=debug msg="Credentials loaded"
watchtower-1  | time="2025-02-10T02:37:59Z" level=debug msg="Checking if pull is needed" container=/ubuntu-app-1 image="ghcr.io/xkalf/autosync_backend:latest"
watchtower-1  | time="2025-02-10T02:37:59Z" level=debug msg="Built challenge URL" URL="https://ghcr.io/v2/"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Got response to challenge request" header="Bearer realm=\"https://ghcr.io/token\",service=\"ghcr.io\",scope=\"repository:user/image:pull\"" status="401 Unauthorized"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Checking challenge header content" realm="https://ghcr.io/token" service=ghcr.io
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Setting scope for auth token" image=ghcr.io/xkalf/autosync_backend scope="repository:xkalf/autosync_backend:pull"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Credentials found."
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Parsing image ref" host=ghcr.io image=xkalf/autosync_backend normalized=ghcr.io/xkalf/autosync_backend tag=latest
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Doing a HEAD request to fetch a digest" url="https://ghcr.io/v2/xkalf/autosync_backend/manifests/latest"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Found a remote digest to compare with" remote="sha256:eb9f9cd2eb968da181bb6f44062d0111a42847e8bae3ac4c6d3f946edd714387"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg=Comparing local="sha256:21ee2e4b9af74b854003644be2b408f7b789da5b57ed7536d6e633f975621f9a" remote="sha256:eb9f9cd2eb968da181bb6f44062d0111a42847e8bae3ac4c6d3f946edd714387"
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Digests did not match, doing a pull."
watchtower-1  | time="2025-02-10T02:38:00Z" level=debug msg="Pulling image" container=/ubuntu-app-1 image="ghcr.io/xkalf/autosync_backend:latest"
watchtower-1  | time="2025-02-10T02:38:06Z" level=debug msg="No new images found for /ubuntu-app-1"
watchtower-1  | time="2025-02-10T02:38:06Z" level=debug msg="This is the watchtower container /ubuntu-watchtower-1"
watchtower-1  | time="2025-02-10T02:38:06Z" level=info msg="Session done" Failed=0 Scanned=2 Updated=0 notify=no