improve comments, move method to SyncMaster interface

src/Contracts/SyncMaster.php

@@ -15,4 +15,6 @@ interface SyncMaster extends Syncable
     public function tenants(): BelongsToMany;
 
     public function getTenantModelName(): string;
+
+    public function getCreateAttributeNames(): array;
 }

src/Contracts/Syncable.php

@@ -15,6 +15,4 @@ interface Syncable
     public function getSyncedAttributeNames(): array;
 
     public function triggerSyncEvent();
-
-    public function getCreateAttributeNames(): array;
 }

tests/ResourceSyncingTest.php

@@ -150,8 +150,9 @@ test('creating the resource in tenant database creates it in central database an
 
     tenancy()->end();
 
-    // assert user was created
+    // Assert central user was created without `code` property
     expect(CentralUser::first()->global_id)->toBe('acme');
+    expect(CentralUser::first()->code)->toBeNull();
 });
 
 test('creating the resource in tenant database creates it in central database and creates the mapping', function () {
@@ -629,7 +630,7 @@ class CentralUser extends Model implements SyncMaster
 
     public function getCreateAttributeNames(): array
     {
-        // attributes should be used when syncing resources from central to tenant DB
+        // Attributes used when creating resources from central to tenant DB
         return [
             'global_id',
             'name',
@@ -673,16 +674,4 @@ class ResourceUser extends Model implements Syncable
             'email',
         ];
     }
-
-    public function getCreateAttributeNames(): array
-    {
-        // attributes should be used when syncing resources from tenant to central DB
-        return [
-            'global_id',
-            'name',
-            'password',
-            'email',
-            'role'
-        ];
-    }
 }