# Supabase Auth Starter V0 Template: The Complete Login & Protected Routes Playbook

- Tool: V0 Templates
- Last updated: July 2026

## TL;DR

The Supabase Auth Starter v0 template ships a full auth stack in one fork: Login Page, Signup Page, Auth Callback Route, middleware session checking, Protected Dashboard, and User Button — all wired to @supabase/supabase-js and @supabase/ssr. Skip the auth boilerplate entirely and use the prompt pack to add Google OAuth, password reset, RLS profiles, and role-based access control.

## Frequently asked questions

### Is the Supabase Auth Starter template free to use?

Yes. Forking v0 community templates is free. You spend V0 credits only when you send prompts to the chat to customize the template. Design Mode changes are also free.

### Can I use this template commercially?

Yes. V0 community templates are available for commercial use. You own the generated code and can use it in any product, including paid SaaS applications. Check v0.dev's terms of service for the full licensing details.

### Why does my fork show blank screens or import errors in V0 preview?

The most common cause is the `@supabase/ssr` package failing in V0's esm.sh preview sandbox. This is a known limitation — the package uses server-side APIs the preview can't run. Click Share → Publish to Production and test on the live Vercel URL instead. The deployed app works correctly.

### I signed up but never received a confirmation email — what's wrong?

Supabase's free tier limits confirmation emails to 4 per hour per project, and they frequently land in spam. For development, disable email confirmation in Supabase Dashboard → Authentication → Providers → Email. For production, configure a custom SMTP provider like Resend or Postmark in Supabase Dashboard → Auth → SMTP Settings.

### Should I use @supabase/auth-helpers-nextjs instead of @supabase/ssr?

No. @supabase/auth-helpers-nextjs is deprecated and should not be used in new projects. This template already uses the correct @supabase/ssr package which Supabase now recommends for all Next.js App Router projects.

### How do I connect a database table to the protected dashboard?

After the Protected Dashboard renders a confirmed user, call supabase.from('your_table').select('*').eq('user_id', user.id) in a Server Component. Add a Row Level Security policy so users can only see their own rows: CREATE POLICY 'users see own data' ON your_table FOR SELECT USING (auth.uid() = user_id). The medium-difficulty prompt in this playbook walks through this for the profiles table.

### Can RapidDev set up this Supabase auth template for my project?

Yes. RapidDev sets up the full Supabase auth flow — login, signup, protected routes, RLS policies, and your schema — typically in 2–3 days.

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Source: https://www.rapidevelopers.com/v0-template/supabase-auth-starter
© RapidDev — https://www.rapidevelopers.com/v0-template/supabase-auth-starter