Hi jeffz - Thanks for your reply!
I looked at solid-cli and solid-auth-cli. They both work well on the command line but unfortunately are not easy to compile into React-Native (which lets you use JS libs but doesn’t give you a full nodejs environment so things like require(‘fs’) won’t work). I considered trying to strip out those bits to get it to work, but it somehow doesn’t seem like the right route to me now that I’ve seen that solid-cli does some clever magic and pretends to be a browser to log in via parsing html and suchlike.
I think I’m going to read about WebID auth and scratch my head about it for a bit longer. It’s not important for me to get this app working. It’s just a simple proof-of-concept sort of idea I’m playing with to learn a bit about Soild.