Update passport.blade.md (#128)

Fixed using Passport in both the central and tenant app

source/docs/v3/integrations/passport.blade.md

@@ -87,7 +87,25 @@ And again, you need to create clients in your tenant database seeding process.
 
 ## Using Passport in both the central & tenant app {#using-passport-in-both-the-central-and-tenant-app}
 
-![Passport for both central & tenant app](/assets/images/passport_universal.png)
+To use Passport on central and tenant application, you may apply the following changes.
+
+- Remove this from the `register` method in your `AppServiceProvider` if you added it previously:
+
+    ```php
+    Passport::ignoreMigrations();
+    ```
+
+- Configure `Passport routes` on the `register` method in your `AppServiceProvider` as follows:
+
+    ```php
+    Passport::routes(null, ['middleware' => [
+        'universal', 
+        InitializeTenancyByDomain::class
+    ]]);
+    ```
+
+- Make a copy of `Passport migrations` to `database/migrations/tenant/` directory
+
 
 And make sure you enable the *Universal Routes* feature.