Good luck, I'll be rooting for you!
Currently balance updates are manual. The idea of account linking is actually a bit of a contentious topic in the PL community. Initially I wanted to steer clear of that notorious support/maintenance/cost tar pit and design a tool where the focus is more on long-term projection rather than fixating on the latest daily stock price fluctuations and possibly missing the forest for the trees.
Later this year I do plan to take another look at those services though.