Common Issues
auth
Login or Signup Not Working in My AI App
Users try to log in or create an account but nothing happens, they get an error, or they're stuck in a loop. This is one of the most common issues with AI-generated apps because auth involves multiple moving parts.
Error Messages You Might See
Invalid login credentials
Email not confirmed
User already registered
Failed to fetch
401 Unauthorized
Redirect URI mismatch
Common Causes
- Auth provider (Supabase, Firebase, Auth0) is not properly configured
- Redirect URLs are wrong — the app sends users to the wrong page after login
- Session or token management is broken — users appear logged in but the app doesn't recognize them
- Email confirmation is required but the emails aren't being sent
- Row Level Security (RLS) policies are blocking access to user data
How to Fix It
- Open browser dev tools (F12) and check the Network tab during login — look for failed API calls
- Verify your auth provider's redirect URL matches your actual app URL
- Check if email confirmation is enabled and whether emails are being sent (check spam folder)
- If using Supabase, check RLS policies — they often block legitimate queries
- Make sure your auth provider's API keys are correct in your environment variables
Real developers can help you.
Taufan
I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms.
Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
zipking
I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify.
As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Matthew Jordan
I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job.
Yovel Cohen
I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.
Dor Yaloz
SW engineer with 6+ years of experience,
I worked with React/Node/Python
did projects with React+Capacitor.js for ios
Supabase expert
prajwalfullstack
Hi Im a full stack developer, a vibe coded MVP to Market ready product, I'm here to help
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
Describe what's wrong in plain English. No technical knowledge needed.
Get HelpFrequently Asked Questions
Users can sign up but can't log in. What's wrong?
Usually an email confirmation issue — check if your auth provider requires email verification. Also verify that the login redirect URL is correct.
Login works on localhost but not in production. Why?
Your auth provider's redirect URLs probably still point to localhost. Update them to your production domain in the auth provider's dashboard.