How to Add Authentication to Your Lovable App
Add authentication to your Lovable app by integrating Supabase Auth. You can set up email/password login, social providers, and protected routes in under 30 minutes using Lovable's built-in Supabase integration.
Why this matters
Without authentication, anyone can access your app and its data. Every serious app needs login — and getting it wrong can expose user information or break trust before you even launch.
What's at stake
Stop wondering if your app is secure enough to share. An unprotected app can leak user data, get abused by bots, and destroy the credibility you're working to build.
Step by step.
Enable Supabase in your Lovable project
Open your Lovable project settings and connect your Supabase instance. Lovable provides a one-click integration that sets up the connection automatically.
Configure authentication providers
In your Supabase dashboard, navigate to Authentication > Providers. Enable email/password as a baseline, then add social providers like Google or GitHub for convenience.
// In your Supabase dashboard:
// Authentication > Providers > Email > Enable
// Authentication > Providers > Google > Enable + add credentialsCreate login and signup pages
Use Lovable's prompt to generate login and signup pages. Ask for a clean form with email/password fields, error handling, and a link to switch between login and signup.
Add route protection
Wrap your authenticated pages in a route guard that checks for a valid session. Redirect unauthenticated users to the login page.
const { data: { session } } = await supabase.auth.getSession();
if (!session) redirect("/login");Test the full flow
Create a test account, verify the signup email flow works, test login/logout, and confirm that protected routes redirect correctly when not authenticated.
Let your users know your app is secure
- Auth readiness checks that verify your setup before launch
- Security badge on your channel showing verified authentication
- Builder log entries to document your security decisions
Keep learning.
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Frequently asked questions.
Yes. You can add Supabase Auth to any existing Lovable project. Connect Supabase in your project settings, then use prompts to add login pages and route protection to your existing app.
Supabase offers a generous free tier that includes up to 50,000 monthly active users for authentication. This is more than enough for most apps getting started.
Lovable can generate the auth code for you via prompts. You describe what you need (login page, protected routes) and Lovable writes the Supabase integration code.