Added page for pulse integration

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

@@ -0,0 +1,41 @@
+---
+title: Laravel Pulse integration
+extends: _layouts.documentation
+section: content
+---
+
+# Laravel Pulse {#laravel-pulse}
+
+To run Laravel Pulse in the main application, set the PULSE_DB_CONNECTION in the Pulse configuration file to point to the central database connection.
+
+If you need to resolve the user from the tenant database, you should create a custom user resolver that implements the ResolvesUsers interface.
+
+```php 
+class TenantUserResolver implements ResolvesUsers
+{
+    public function key($user): int|string|null
+    {
+        return implode(':', [tenant()->name, $user->name]);
+    }
+
+    public function load(Collection $keys): self
+    {
+        return $this;
+    }
+
+    public function find(int|string|null $key): object
+    {
+        [$tenant, $user] = explode(':', $key);
+
+        return (object) [
+            'name'  => $user,
+            'extra' => $tenant,
+        ];
+    }
+}
+```
+
+Next, register this resolver in the AppServiceProvider:
+```php
+$this->app->singleton(ResolvesUsers::class, TenantUserResolver::class);
+```