separate auth logic from entity logic

app/Services/Import/Quickbooks/Auth.php

@@ -0,0 +1,37 @@
+<?php
+namespace App\Services\Import\Quickbooks;
+
+use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\Cache;
+use App\Services\Import\QuickBooks\Contracts\SDKInterface as QuickbooksInterface;
+
+final class Auth
+{    
+    private QuickbooksInterface $sdk;
+
+    public function __construct(QuickbooksInterface $quickbooks) {
+        $this->sdk = $quickbooks;
+    }
+
+    public function accessToken(string $code, string $realm ) : array
+    {
+       // TODO: Get or put token in Cache or DB?
+        return $this->sdk->accessToken($code, $realm);
+    }
+
+    public function refreshToken() : array
+    {
+        // TODO: Get or put token in Cache or DB?
+        return  $this->sdk->refreshToken();
+    }
+
+    public function getAuthorizationUrl(): string 
+    {
+        return $this->sdk->getAuthorizationUrl();
+    }
+
+    public function getState() : string
+    {
+        return $this->sdk->getState();
+    }
+}

app/Services/Import/Quickbooks/Service.php

@@ -3,6 +3,7 @@ namespace App\Services\Import\Quickbooks;
 
 use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\Cache;
+use App\Services\Import\Quickbooks\Auth;
 use App\Repositories\Import\Quickbooks\Contracts\RepositoryInterface;
 use App\Services\Import\QuickBooks\Contracts\SdkInterface as QuickbooksInterface;
 
@@ -14,6 +15,11 @@ final class Service
         $this->sdk = $quickbooks;
     }
 
+    public function getOAuth() : Auth
+    {
+        return new Auth($this->sdk);
+    }
+
     public function getAccessToken() : array
     {
         // TODO: Cache token and