I've had a few side project ideas over the years but have never implemented one because I lack knowledge in (but willing to learn):

* implementing social logins (OAuth), account management, etc.

* managing backend permissions (RBAC always looks more complicated than it should be). My projects might have three tiers: free, hobbyist, pro

* handling payments securely while actually monitoring for abuse/intrusion

Which social logins are allowed to tie into your project?

What are you using for authn/authz? My projects would be very low traffic, so I wouldn't want to commit to a big monthly spend. Are you rolling your own or using Auth0/Clerk/Supabase for auth and Stripe for payments? I'm comfortable with AWS, Cloudflare, Go, JS, and Linux. Are there any GitHub repos that I can look at for this?

How well do frontier LLMs (Claude Opus, etc.) do at generating clean, auditable code for this kind of thing? Is anyone actually trusting AI-written auth/payment code and how do you review it?