added helper methods and validators

Author: ArnabChatterjee20k

src/Database/Document.php

@@ -164,6 +164,14 @@ public function getCreatedAt(): ?string
         return $this->getAttribute('$createdAt');
     }
 
+    /**
+     * @return string|null
+     */
+    public function getCreatedBy(): ?string
+    {
+        return $this->getAttribute('$createdBy');
+    }
+
     /**
      * @return string|null
      */
@@ -172,6 +180,14 @@ public function getUpdatedAt(): ?string
         return $this->getAttribute('$updatedAt');
     }
 
+    /**
+     * @return string|null
+     */
+    public function getUpdatedBy(): ?string
+    {
+        return $this->getAttribute('$updatedBy');
+    }
+
     /**
      * @return int|null
      */

src/Database/Validator/Structure.php

@@ -84,7 +84,29 @@ class Structure extends Validator
             'signed' => false,
             'array' => false,
             'filters' => [],
-        ]
+        ],
+        [
+            '$id' => '$createdBy',
+            'type' => Database::VAR_STRING,
+            'format' => '',
+            'size' => 0,
+            'signed' => false,
+            'required' => false,
+            'default' => null,
+            'array' => false,
+            'filters' => []
+        ],
+        [
+            '$id' => '$updatedBy',
+            'type' => Database::VAR_STRING,
+            'format' => '',
+            'size' => 0,
+            'signed' => false,
+            'required' => false,
+            'default' => null,
+            'array' => false,
+            'filters' => []
+        ],
     ];
 
     /**