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supabase/apps/ui-library/content/docs/tanstack/password-based-auth.mdx
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Ivan Vasilov 429aa9d084 fix: More fixes for UI Library (#34552)
* Add realtime chat to the landing page.

* Fix the realtime cursor demo on the landing page.

* Fix a bad spelling of shadcn.

* Fix the wrong link in RR auth.

* Change the demo for reatlime cursor to use predefined names.

* Fix the React Router auth block docs.

* Regenerate the realtime chat code.

* Add a docs field to the clients blocks. Add a missing package to the nextjs client block.

* Add links to additional docs on the auth blocks pages.

* Add additional links to the current user avatar docs.

* Add additional links to the client docs.

* Add additional links to the dropzone docs.

* Add additional links to the avatar stack.

* Add additional links to the realtime cursor.

* Add additional links to the realtime chat.

* Fix the dropzone links.
2025-03-31 18:40:03 +08:00

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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
<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
First, add a `.env` file to your project with the following environment variables:
```env
VITE_SUPABASE_URL=
VITE_SUPABASE_ANON_KEY=
```
- If you're using supabase.com, you can find these values in the [Connect modal](https://supabase.com/dashboard/project/_?showConnect=true) 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 signup</h2>
<p>Follow this link to confirm your user:</p>
<p>
<a
href="{{ .SiteURL }}/auth/confirm?token_hash={{ .TokenHash }}&type=email&next={{ .RedirectTo }}"
>Confirm your email</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/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 Password</h2>
<p>Follow this link to reset the password for your user:</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 the `login.tsx` and `update-password.tsx` components to point to the logged-in routes in 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)