401 Unauthorized on apt update

My environment:
Ubuntu 22.04

Customer environment:
Toradex Torizon Docker image based on debian:12.5-slim

Both customer and I have followed documentation outlined on page [Enterprise Qt Debian Packages | Qt 6.7|https://doc.qt.io/qt-6/qt-debian-packages.html] to the line and faced the same issue - 401 Unauthorized.

E: Failed to fetch https://debian-packages.qt.io/debian/enterprise/qt-6.7.0-arm64/dists/tqtc-jammy/InRelease  401  Unauthorized [IP: X.X.X.X 443]
E: The repository 'https://debian-packages.qt.io/debian/enterprise/qt-6.7.0-arm64 tqtc-jammy InRelease' is not signed. 

In both cases, I've verified tqtc.lists, auth.conf and gpg key to be correct. To solve the problem, I've removed signed-by from tqtc.lists and added the gpg key using apt-key add. This API is depreciated so we should find a viable solution and update the documentation. Potentially it would be just to copy gpg key to /etc/apt/keyrings