Auth system (PRO)
Production-ready authentication with real flows, OAuth, session handling, and security foundations for real SaaS products.
Authentication that actually shipsLink to section
Starter Free gives you auth screens and UX states.
Starter Pro gives you a production-ready authentication system for real SaaS products:
- real users
- real sessions
- real providers
- real token flows
- real protected routes
- real account lifecycle foundations
This is the layer that turns login pages into a working product system.
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Setup guide
Core idea
Auth is not UI. Auth is lifecycle, security, state, redirects, provider rules, and trust.
What this solvesLink to section
Authentication is usually one of the first serious blockers before launch.
It looks simple at the UI level:
- login
- register
- forgot password
- OAuth buttons
But production auth also needs:
- password hashing
- session persistence
- email verification
- password reset tokens
- provider account linking
- protected route behavior
- safe disconnect rules
- rate limiting foundations
- secure error handling
Starter Pro gives you a structured foundation for that layer so you do not rebuild the full lifecycle from scratch.
What is includedLink to section
Credentials auth
Email and password authentication with account creation, password validation, password reset, and password change foundations.
OAuth providers
Google and GitHub OAuth foundations with connected account patterns and safer provider lifecycle handling.
Verification and tokens
Email verification, reset password, token expiration, and recovery flows structured for production use.
Protected foundations
Session-aware UI, protected routes, auth-aware backend logic, and account safety patterns.
Auth flowsLink to section
Sign in flow
- email and password sign in
- OAuth sign in
- session creation
- error-aware UX
- redirect to protected app surface
Registration flow
- real account creation
- password validation
- email verification-ready lifecycle
- provider signup path
- session-aware onboarding path
Password lifecycle
- forgot password request
- reset password token
- expiration-aware recovery flow
- in-session password change
- add password for OAuth-only users
Connected accounts
- Google account connection
- GitHub account connection
- provider linking patterns
- safe disconnect rules
- account fallback behavior
Starter Free vs Starter ProLink to section
| Capability | Starter Free | Starter Pro |
|---|---|---|
| Auth screens | Included | Included |
| Credentials auth | Mocked | Real |
| Google OAuth | Not included | Real |
| GitHub OAuth | Not included | Real |
| Sessions | Mocked / partial | Real |
| Email verification | Not included | Real |
| Forgot password | UI only | Real flow |
| Reset password | UI only | Token-based |
| In-session password change | Not included | Included |
| OAuth account linking | Not included | Included |
| Safe provider disconnect rules | Not included | Included |
| Protected routes | Conceptual | Production-ready foundation |
| Rate limiting foundations | Not included | Included pattern |
Simple distinction
Starter Free simulates auth. Starter Pro handles real users.
Data model responsibilitiesLink to section
Starter Pro auth is designed around the structures a serious SaaS usually needs.
Typical auth responsibilities include:
| Area | Purpose |
|---|---|
| User | Identity, email, profile image, verification state |
| Account | OAuth provider accounts and account linking |
| Session | Active user sessions |
| VerificationToken | Auth.js-compatible verification flows |
| UserToken | Email verification and password reset lifecycle |
| AuthAttempt | Audit and rate-limiting foundation |
Why this matters
Production auth is not only about signing in. It is about storing enough state to make account lifecycle, recovery, and provider logic safe.
Protected routesLink to section
Auth becomes valuable when it protects real product surfaces.
Starter Pro is designed so the auth layer can protect:
- dashboard
- settings
- billing
- admin
- customer data
- plan-aware product areas
/dashboard
/settings
/billing
/adminA good protected route system should:
- redirect anonymous users
- preserve safe app boundaries
- expose session-aware UI
- avoid leaking private state
- work with billing and backend ownership rules
Integration with billingLink to section
Auth and billing are connected in a real SaaS.
A customer is not just a payment record. A customer belongs to a user or organization.
That means auth must support:
- account identity
- customer ownership
- subscription access
- billing portal access
- plan-aware feature gating
Why auth matters for revenue
You cannot reliably charge customers until you can reliably identify them.
Security rulesLink to section
Use these rules when adapting the auth layer.
Prefer
- server-side validation for auth actions
- short-lived tokens for recovery flows
- generic forgot-password confirmation copy
- clear session-aware redirects
- provider disconnect rules that never lock users out
Avoid
- revealing whether an email exists
- allowing users to disconnect their only login method
- trusting client-side auth state for protected data
- returning overly specific auth errors
- mixing auth logic directly into unrelated product components
Decision guideLink to section
Use Starter Pro auth when:
- real users need accounts
- sessions must persist
- OAuth providers matter
- password reset must work
- routes need protection
- billing depends on identity
- account lifecycle edge cases matter
Stay on Starter Free when:
- you are still validating UX
- you do not need real users yet
- auth is not blocking progress
- you are not preparing monetization
Upgrade when auth becomes real
Starter Free helps you design the auth surface. Starter Pro gives you the auth system behind it.
Implementation checklistLink to section
Before treating auth as launch-ready, validate:
- credentials sign in
- OAuth sign in
- registration
- email verification
- forgot password
- reset password
- password change
- protected route redirects
- session-aware navigation
- connected account behavior
- provider disconnect rules
- billing access ownership
Validation principle
Do not customize deeply before validating the default flows. Confirm the foundation first, then adapt the product.
Common questionsLink to section
Next stepsLink to section
Connect authenticated users to customers, subscriptions, and plan-aware access.
Understand how auth integrates with data ownership and server-side logic.
Validate auth, billing, backend, and delivery before launch.
Review the full Starter Pro foundation.
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View pricing
Ship auth once. Ship it right.
The cost of weak auth is usually paid later. Starter Pro helps you avoid that by starting from a stronger foundation.