Simple prompt:

"Add user authentication with email and password login. 
Include signup, login, and logout functionality."

Lovable generates:

• Login page
• Signup page
• Auth backend
• Session management

Takes 5-10 minutes.

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1. Sign up with test email
2. Log in with credentials
3. Access protected pages
4. Log out and verify redirect

Make sure it all works before continuing.

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Tell Lovable:

"Make the dashboard page only accessible to logged-in users. 
Redirect to login if not authenticated."

Lovable adds:

• Auth checks
• Redirects
• Protected routes

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"Show only the current user's tasks. Each user should see their own data only."

Lovable:

• Filters data by user
• Adds user ID to records
• Secures queries

Now each user has their own data.

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Password Reset

"Add forgot password functionality with email reset link"

Social Login

"Add Google login option"

Email Verification

"Require email verification after signup"

Profile Page

"Add user profile page where users can update their name and email"

Lovable handles all of these.

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Must test:

• Sign up new user
• Log in existing user
• Access protected pages
• Log out
• Try accessing protected page while logged out

All should work correctly.

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Forgot to Protect Pages

"Make sure all pages except login and signup require authentication"

Users See Each Other's Data

"Fix data filtering - users should only see their own data"

Logout Not Working

"Fix logout - should clear session and redirect to login"

Lovable fixes these quickly.

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1. Add Auth Early
Easier to add before building user-specific features.

2. Test Thoroughly
Try to break it. Make sure data is truly private.

3. Think About UX
Where should users go after login? After signup?

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Lovable handles:

• Password hashing
• Session management
• HTTPS (on deployment)
• SQL injection prevention

You're protected by default.

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For MVPs: Email/password auth is fine.

For production: Add social login (easier for users).

Start simple. Add features based on user feedback.

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Get started:

• Lovable - Build with auth

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More Lovable guides:

• Build with Lovable
• Lovable vs Bubble

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Disclosure: Some links are affiliate links.