Laravel Sanctum can be use Multiauth guard
Stefan Bogdanescu
Founder & Senior Architect · 2026-06-29
# Mastering Multi-Auth Guards in Laravel Sanctum: Beyond Simple Tokens
It is a common hurdle when scaling applications with Laravel and Sanctum: moving beyond simple user authentication to implement granular Role-Based Access Control (RBAC). The confusion you are experiencing—where switching middleware doesn't immediately restrict access based on separate "guards"—stems from a misunderstanding of how Sanctum handles *authentication* versus *authorization*.
This post will dive deep into why you might be facing this issue and provide the correct, robust architectural pattern for managing multiple user types (like Admin vs. Standard User) within a Laravel application using Sanctum.
## The Sanctum Misconception: Authentication vs. Authorization
Laravel Sanctum is primarily an **authentication** layer. It verifies *who* the requester is by validating a token against the database. When you use `auth:sanctum_admin`, you are telling Laravel, "Verify this request came from a valid Sanctum token." It does not inherently check if that authenticated user *possesses* the 'admin' role.
The reason you can still access resources with a standard user account is that the middleware only confirms successful *authentication*, not successful *authorization*. To enforce true multi-guard logic, you must implement authorization checks *after* Sanctum has successfully identified the user.
## The Solution: Implementing Robust Authorization with Roles and Gates
To solve this, we need to leverage Laravel's built-in authorization features—Policies and Gates—alongside your existing authentication structure (which might involve separate tables for roles, permissions, or user types).
### Step 1: Database Structure for Roles
Instead of trying to force Sanctum into managing complex role hierarchies directly, let Eloquent handle the relationships. You should have a clear relationship between the `User` model and their respective roles or permissions.
For example, if you are using a package or custom setup that separates users, ensure your `User` model can query these relationships easily:
```php
// Example User Model Structure (Focusing on RBAC)
class App\Models\User extends Authenticatable
{
// Assuming a many-to-many relationship with roles
public function roles()
{
return $this->belongsToMany(Role::class);
}
public function isAdmin()
{
// Simple check based on role existence
return $this->roles()->where('name', 'admin')->exists();
}
}
```
### Step 2: Enforcing Access with Gates and Middleware
Once the authorization data is structured, you use Laravel's powerful Gate system to define what an authenticated user *can* do. This logic lives in the application layer, not solely within the Sanctum middleware itself.
Create a Gate to check for admin status:
```php
// app/Providers/AuthServiceProvider.php
use Illuminate\Support\Facades\Gate;
public function boot()
{
$this->registerPolicies();
Gate::define('manage-admin', function (User $user) {
return $user->isAdmin();
});
}
```
Now, you can apply this Gate directly in your route or controller logic. This ensures that even if a user possesses a Sanctum token, they must also satisfy the specific authorization requirement to access the data.
### Step 3: Applying Custom Logic via Middleware
Instead of trying to create separate authentication guards for roles (which complicates Sanctum's token system), apply your custom Gate check within the standard middleware chain. This gives you fine-grained control over access.
If you want an endpoint only accessible by admins, you would structure your route like this:
```php
Route::middleware(['auth:sanctum', 'can:manage-admin'])->group(function () {
// This code block is only accessible if the user is authenticated AND has the 'manage-admin' gate passed.
Route::get('/admin/dashboard', function () {
return view('admin.dashboard');
});
});
```
This approach decouples authentication (Sanctum token) from authorization (Role check), providing a cleaner, more scalable architecture—a core principle often emphasized in solid Laravel development practices found on the [Laravel Company website](https://laravelcompany.com).
## Conclusion
The issue you encountered is less about Sanctum failing and more about defining the scope of control. Sanctum handles *who* is making the request; Gates and Policies handle *what* that user is allowed to do. By combining token-based authentication with robust Eloquent role checks, you achieve a multi-guard system that is both secure and highly maintainable. Focus on structuring your data correctly and leveraging Laravel's authorization features to build complex access rules effectively.