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.
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.
Bastien Labelle
Full stack dev w/ 20+ years of experience
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
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
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.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Daniel Vázquez
Software Engineer with over 10 years of experience on Startups, Government, big tech industry & consulting.
Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
Expertise:
💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web.
🖋️ Sharing insights through technical writing, blogging, and open-source contributions.
🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences.
Notable Achievements:
🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development.
🌟 Open source contributions on Github & StackOverflow for Flutter & Dart
🎖️ Worked on improving app performance and user experience with smart solutions.
Milan is always happy to connect, work on new ideas, and explore the latest in technology.
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.