https://www.fosslinux.com/114195/ways-to-parse-an-xml-file-on-linux.htm
https://cheat.sh/xmllint
https://cheat.sh/xml

xml sel -t -v configuration/gui/password 'Library/Application Support/Syncthing/config.xml'
xml ed -L -d 'configuration/gui/password' 'Library/Application Support/Syncthing/config.xml'