Replit Auth
Replit Auth is a built-in authentication system that lets you add user login to your apps with minimal setup.
Put simply, Replit Auth is a way to verify who users are and control what they can access in your application. Instead of building complex authentication systems from scratch, Replit Auth provides a secure, ready-to-use solution integrated with Replit’s infrastructure.
Why use Replit Auth
Authentication is a challenging problem that entire companies dedicate themselves to solving. Your app’s primary purpose likely isn’t authentication - it’s whatever unique idea or solution you’re building.
Replit Auth offers:
- Zero setup - Add authentication with a single prompt in Agent
- Built-in security - Uses Replit’s infrastructure with protections against common attacks
- User management - Simplified user administration through the Auth pane
- Database integration - Automatic user entries in your database
- Customizable login page - Personalize the login experience for your app
- Password reset - Replit sends password reset emails for you, so you don’t must set up your own email delivery provider.
Getting started with Replit Auth
The only way to implement Replit Auth is by using Agent. Simply include a request for Replit Auth in your prompt:
Agent will set up all the necessary code and configurations for authentication. Manual implementation is not supported, as Agent handles all the complexity for you.
To learn more about Agent capabilities, see the Replit Agent documentation and Agent integrations.
For tips on writing effective prompts, check out Effective prompting with Replit.
Managing users
Replit Auth provides a built-in user management interface accessible through the Auth pane in your Replit workspace.
From this interface, you can:
- View all authenticated users
- Ban users from your application
- View user details
- Track user activity
Customizing the login page
You can customize the login page to match your app’s branding:
- Navigate to the Auth pane in your Replit workspace
- Click on Configure
- Customize the following elements:
- App name
- App icon
- Login methods (Google, GitHub, X, Apple, Email)
Your changes will immediately appear on your app’s login page.
Connecting user data with your database
Replit Auth automatically creates user entries in your database. This makes it easy to store user-specific data. Agent will guide you on properly connecting user data with your database.
For more information on databases, see the Replit Database Documentation.
Security considerations
Replit Auth leverages Replit’s infrastructure, providing built-in protections against common security threats. However, you should still follow these best practices:
- Always validate user authentication server-side before performing sensitive operations
- Never store sensitive information like passwords in your code
- Use environment variables for any API keys or secrets
- Implement proper access controls for user data
For more information on security, check out:
Troubleshooting
Common issues
-
User not recognized after login
- If you’re experiencing issues, ask Replit Assistant for help debugging your authentication implementation.
-
Custom icon not displaying
- Make sure the icon URL is accessible and in a supported format (PNG or JPG).