I just figured out today while helping somebody else that you can use Python Flask to make an account system (see my post). So, if you know Python, you can do that (and Replit auth is not the only way because we could use Replit secrets to keep passwords secure for a normal account system). And there’s probably a way to do it using NodeJS, but I don’t really know JavaScript so I can’t help with that.
It was surprisingly simple turning the Replit Auth Flask template into an account system. Using HTML input boxes, we could allow the user to add themself to the text file full of users instead of having to do it manually. I’m not saying that PHP isn’t the best option, I’m just saying if you know a different language that’s capable, why not use it instead?