Files
supabase/apps/ui-library/content/docs/tanstack/password-based-auth.mdx
Saxon Fletcher cb35e1f98e chore(library): update routes, redirects, and naming (#48668)
Our UI Library registry is expanding to include blocks that go beyond UI
and in some cases focus purely on back-end. This PR is a precursor to
adding more back-end related blocks. This PR includes the `ui-library ->
library` rename plus redirects and small UI copy updates. Since this is
a rename we'll need to update Vercel configuration.

## Vercel rollout

Keep the Library project Root Directory as `apps/ui-library`

1. In the **Library** Vercel project, set:

   `NEXT_PUBLIC_BASE_PATH=/library`

Apply it to Preview and Production, then redeploy the Library project.

2. In the **www** Vercel project, add:

`NEXT_PUBLIC_LIBRARY_URL=<current value of NEXT_PUBLIC_UI_LIBRARY_URL>`

Apply it to Preview and Production. Keep `NEXT_PUBLIC_UI_LIBRARY_URL`
during the migration, then redeploy the www project.

3. Deploy in this order:

   1. Library project
   2. www project

4. Validate:

   - `/library`
   - `/library/docs/nextjs/password-based-auth`
   - `/ui` redirects to `/library`
- `/ui/docs/nextjs/password-based-auth` redirects to
`/library/docs/nextjs/password-based-auth`
- `/ui/docs/ai-editors-rules/*` still uses its existing Docs redirects

No Vercel dashboard redirect rules are needed. Environment-variable
changes require a new deployment.

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Supabase UI Library has been renamed to **Supabase Library** across
navigation, pages, documentation, and resource links.
* The Library is now available at `/library`, with updated descriptions
covering components, blocks, and developer tools.
* **Bug Fixes**
* Added permanent redirects from legacy `/ui` URLs to corresponding
`/library` paths.
* Updated links throughout the site and documentation to prevent broken
navigation and references.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-08-11 13:37:32 +10:00

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---
title: Password-based Authentication
description: Password-based authentication block for TanStack Start
---
<BlockPreview name="password-based-auth/auth/sign-up" />
## Installation
<BlockItem name="password-based-auth-tanstack" description="Supabase Client for TanStack Start" />
## Folder structure
This block includes the [Supabase client](/library/docs/tanstack/client). If you already have one installed, you can skip overwriting it.
<RegistryBlock itemName="password-based-auth-tanstack" />
## Usage
Once you install the block in your TanStack Start project, you'll get all the necessary pages and components to set up a password-based authentication flow.
### Getting started
After installing the block, you'll have the following environment variables in your `.env.local` file:
```env
VITE_SUPABASE_URL=
VITE_SUPABASE_PUBLISHABLE_KEY=
```
- If you're using supabase.com, you can find these values in the [Connect modal](https://supabase.com/dashboard/project/_?showConnect=true&connectTab=frameworks&framework=react&using=vite&with=supabasejs) under App Frameworks or in your project's [API settings](https://supabase.com/dashboard/project/_/settings/api).
- If you're using a local instance of Supabase, you can find these values by running `supabase start` or `supabase status` (if you already have it running).
### Adding email templates
1. Add an [email template for sign-up](https://supabase.com/dashboard/project/_/auth/templates) to the Supabase project. Your signup email template should contain at least the following HTML:
```html
<h2>Confirm your email address</h2>
<p>Follow the link below to confirm this email address and finish signing up.</p>
<p>
<a
href="{{ .SiteURL }}/auth/confirm?token_hash={{ .TokenHash }}&type=email&next={{ .RedirectTo }}"
>Confirm email address</a
>
</p>
```
For detailed instructions on how to configure your email templates, including the use of variables like `{{ .SiteURL }}`,`{{ .TokenHash }}`, and `{{ .RedirectTo }}`, refer to our [Email Templates guide](https://supabase.com/docs/guides/auth/auth-email-templates).
1. Add an [email template for reset password](https://supabase.com/dashboard/project/_/auth/templates) to the Supabase project. Your reset password email template should contain at least the following HTML:
```html
<h2>Reset your password</h2>
<p>We received a request to reset your password. Follow the link below to choose a new one.</p>
<p>
<a
href="{{ .SiteURL }}/auth/confirm?token_hash={{ .TokenHash }}&type=recovery&next={{ .RedirectTo }}"
>Reset password</a
>
</p>
```
### Setting up routes and redirect URLs
1. Set the site URL in the [URL Configuration](https://supabase.com/dashboard/project/_/auth/url-configuration) settings in the Supabase Dashboard.
1. Set up the route users will visit to reset or update their password. Go to the [URL Configuration](https://supabase.com/dashboard/project/_/auth/url-configuration) settings and add the `forgot-password` route to the list of Redirect URLs. It should look something like: `http://example.com/auth/forgot-password`.
1. Update the redirect paths in `login.tsx` and `update-password.tsx` components to point to the logged-in routes in your app. 1. Our examples use `/protected`, but you can set this to whatever fits your app.
## Further reading
- [Password-based authentication (PKCE flow)](https://supabase.com/docs/guides/auth/passwords?queryGroups=flow&flow=pkce)
- [Authentication error codes](https://supabase.com/docs/guides/auth/debugging/error-codes)
- [Email templates](https://supabase.com/docs/guides/auth/auth-email-templates)
- [Email templates for local development](https://supabase.com/docs/guides/local-development/customizing-email-templates)
- [Custom SMTP](https://supabase.com/docs/guides/auth/auth-smtp)