How do I add login to Lovable?

Ask Lovable to add authentication — it enables Lovable Cloud (if not already on), then generates sign-up/login pages and wires them to email, Google, or other providers.

How do I add user registration?

Ask Lovable to add sign-up with the fields and verification behaviour you want — it builds the form, creates the user in Lovable Cloud's auth system, and can store extra profile details in your database.

How do I add Google login?

Ask Lovable to add Google sign-in — it can use Lovable's managed Google OAuth for a quick setup, or your own Google Cloud OAuth credentials if you need custom branding or scopes.

How do I add password reset?

Ask Lovable to add a "forgot password" flow — it uses Lovable Cloud's authentication to email a reset link and lets the user set a new password.

Why isn't my login working?

Check the browser console for the actual error first — common causes are unconfirmed email, a redirect URL mismatch, RLS blocking the post-login profile read, or a provider (like Google) misconfigured for the current domain.

Why are verification emails not arriving?

Usually the email lands in spam, the sending rate limit on Lovable Cloud's default mailer has been hit, or you haven't connected a proper email provider yet.

How do I restrict pages to logged-in users?

Wrap the routes in a protected-route component that checks the current auth session and redirects signed-out users to login, and back this up with row-level security on any data those pages fetch.

How do I create admin users?

Add a `user_roles` table with an `admin` role, assign it to the specific user's ID, and check that role server-side (in RLS policies and any admin-only functions) rather than trusting a front-end flag.

How do I create different user roles?

Store roles in a dedicated `user_roles` table (never a column on the user's profile), and use a security-definer function to check roles inside RLS policies and route guards.

How do I build an admin dashboard?

Ask Lovable to build a role-gated route that lists and manages your data (users, orders, content), backed by RLS policies that only let accounts with the `admin` role query the underlying tables.

How do I prevent normal users accessing admin pages?

Guard the admin route with a check against the user's role from your `user_roles` table (not a front-end-only flag), and mirror that same check in RLS policies on any data the admin page loads.

How do I delete a user?

Ask Lovable to add an admin action that deletes both the user's auth account and their related data (profile rows, uploads, etc.), since removing one without the other leaves orphaned records or broken references.

How do I let users edit their profiles?

Add a profile form bound to a `profiles` table row keyed by the user's ID, with an RLS policy that only lets each user update their own row, not anyone else's.

Why does my app keep redirecting to login?

Last checked 31 Aug 2026

Short answer

This is almost always a session or route-guard bug: either the auth session isn't persisting, or a protected route checks auth state before it's loaded, so it bounces back to login even when signed in.

Why the redirect loop happens

Lovable Cloud (and connected Supabase projects) use auth tokens stored in the browser to know a user is signed in. A redirect loop to login usually means one of:

The app checks session or user before Supabase has finished loading it (a race condition on first render).
The session token isn't being persisted (e.g. cookies/local storage blocked, or an incognito/testing quirk).
Your protected route wrapper redirects on any falsy user state, including the brief "loading" state, instead of waiting.
The redirect target itself is behind the same guard, so it loops.

How to fix it

Ask Lovable: "Show me the protected route component and how it checks auth state."
Confirm it distinguishes three states: loading, signed-in, signed-out — and only redirects once loading is false.
Check that the login page itself isn't wrapped in the same auth guard.
Clear cookies/local storage and test a fresh sign-in end to end, then test a hard refresh while logged in.

Add a loading state to my auth check so protected routes wait for the session to finish loading before redirecting to login.

What usually goes wrong

Testing in an environment that blocks third-party cookies or local storage (some in-app browsers do this).
Multiple redirect rules stacked (e.g. router-level guard plus a component-level guard) fighting each other.
Environment/config mismatch after connecting a custom domain — see why-does-my-domain-show-a-404-or-403-error for domain-specific auth issues.

Testing properly

Use a private/incognito window for each test so old sessions don't mask the bug. See how-do-i-test-authentication-properly for a fuller checklist.

Sources

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