Added user and organization deletion system; Added coverage annotations

app/Exceptions/Api/ApiException.php

@@ -13,6 +13,11 @@ abstract class ApiException extends Exception
 {
     public const string KEY = 'api_exception';
 
+    public function __construct()
+    {
+        parent::__construct(static::KEY);
+    }
+
     /**
      * Render the exception into an HTTP response.
      */

app/Exceptions/Api/CanNotDeleteUserWhoIsOwnerOfOrganizationWithMultipleMembers.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Exceptions\Api;
+
+class CanNotDeleteUserWhoIsOwnerOfOrganizationWithMultipleMembers extends ApiException
+{
+    public const string KEY = 'can_not_delete_user_who_is_owner_of_organization_with_multiple_members';
+}

app/Exceptions/Api/EntityStillInUseApiException.php

@@ -12,7 +12,7 @@ class EntityStillInUseApiException extends ApiException
 
     public function __construct(string $modelToDelete, string $modelInUse)
     {
-        parent::__construct('', 0, null);
+        parent::__construct();
         $this->modelToDelete = $modelToDelete;
         $this->modelInUse = $modelInUse;
     }