Turns out, for spotify integration, I can’t actually let other people use my spotify development mode app. It’s limited to 5 users which I have to invite by email. And to get a quota extension, I need 250,000 existing monthy active users, which I’m slightly short of (by about 249,999). So, I changed the login flow so that each user has to make their own Spotify app, and log in using the client ID from there. I didn’t change the current PKCE flow since that didn’t really need to be changed, but setup unfortunately takes a little more work now.

Also, it has transparency now.