Auth

Login with GitHub

To enable GitHub Auth for your project, you need to set up a GitHub OAuth application and add the application credentials to your Supabase Dashboard.

Overview

Setting up GitHub logins for your application consists of 3 parts:

Find your callback URL

The next step requires a callback URL, which looks like this: https://<project-ref>.supabase.co/auth/v1/callback

  • Go to your Supabase Project Dashboard
  • Click on the Authentication icon in the left sidebar
  • Click on Providers under the Configuration section
  • Click on GitHub from the accordion list to expand and you'll find your Callback URL, you can click Copy to copy it to the clipboard

Register a new OAuth application on GitHub

  • Navigate to the OAuth apps page
  • Click Register a new application. If you've created an app before, click New OAuth App here.
  • In Application name, type the name of your app.
  • In Homepage URL, type the full URL to your app's website.
  • In Authorization callback URL, type the callback URL of your app.
  • Leave Enable Device Flow unchecked.
  • Click Register Application.

Copy your new OAuth credentials

  • Copy and save your Client ID.
  • Click Generate a new client secret.
  • Copy and save your Client secret.

Enter your GitHub credentials into your Supabase project

  • Go to your Supabase Project Dashboard
  • In the left sidebar, click the Authentication icon (near the top)
  • Click on Providers under the Configuration section
  • Click on GitHub from the accordion list to expand and turn GitHub Enabled to ON
  • Enter your GitHub Client ID and GitHub Client Secret saved in the previous step
  • Click Save

Add login code to your client app

When your user signs in, call signInWithOAuth() with github as the provider:


_10
async function signInWithGithub() {
_10
const { data, error } = await supabase.auth.signInWithOAuth({
_10
provider: 'github',
_10
})
_10
}

For a PKCE flow, for example in Server-Side Auth, you need an extra step to handle the code exchange. When calling signInWithOAuth, provide a redirectTo URL which points to a callback route. This redirect URL should be added to your redirect allow list.

In the browser, signInWithOAuth automatically redirects to the OAuth provider's authentication endpoint, which then redirects to your endpoint.


_10
await supabase.auth.signInWithOAuth({
_10
provider,
_10
options: {
_10
redirectTo: `http://example.com/auth/callback`,
_10
},
_10
})

At the callback endpoint, handle the code exchange to save the user session.

Create a new file at app/auth/callback/route.ts and populate with the following:

app/auth/callback/route.ts

_30
import { NextResponse } from 'next/server'
_30
// The client you created from the Server-Side Auth instructions
_30
import { createClient } from '@/utils/supabase/server'
_30
_30
export async function GET(request: Request) {
_30
const { searchParams, origin } = new URL(request.url)
_30
const code = searchParams.get('code')
_30
// if "next" is in param, use it as the redirect URL
_30
const next = searchParams.get('next') ?? '/'
_30
_30
if (code) {
_30
const supabase = createClient()
_30
const { error } = await supabase.auth.exchangeCodeForSession(code)
_30
if (!error) {
_30
const forwardedHost = request.headers.get('x-forwarded-host') // original origin before load balancer
_30
const isLocalEnv = process.env.NODE_ENV === 'development'
_30
if (isLocalEnv) {
_30
// we can be sure that there is no load balancer in between, so no need to watch for X-Forwarded-Host
_30
return NextResponse.redirect(`${origin}${next}`)
_30
} else if (forwardedHost) {
_30
return NextResponse.redirect(`https://${forwardedHost}${next}`)
_30
} else {
_30
return NextResponse.redirect(`${origin}${next}`)
_30
}
_30
}
_30
}
_30
_30
// return the user to an error page with instructions
_30
return NextResponse.redirect(`${origin}/auth/auth-code-error`)
_30
}

When your user signs out, call signOut() to remove them from the browser session and any objects from localStorage:


_10
async function signOut() {
_10
const { error } = await supabase.auth.signOut()
_10
}

Resources