I'm getting the error the question author says, but I'm not getting the error in the logs pointed here: https://code.visualstudio.com/docs/editor/settings-sync#_troubleshooting-keychain-issues. I followed your approach, but I have gnome-keyring running, I installed sudo apt install libsecret-1-0 libsecret-1-dev, and "security.workspace.trust.enabled" was already true. But I'm still getting the same error when trying to login to GitHub.