feat: update default values

app/config/collections.php

@@ -987,7 +987,7 @@ $collections = [
                 'filters' => ['datetime'],
             ],
             [
-                '$id' => 'sdks',
+                '$id' => ID::custom('sdks'),
                 'type' => Database::VAR_STRING,
                 'format' => '',
                 'size' => Database::LENGTH_KEY,

src/Appwrite/Utopia/Response/Model/Key.php

@@ -62,7 +62,6 @@ class Key extends Model
                 'type' => self::TYPE_DATETIME_EXAMPLE,
                 'description' => 'Most recent access date in Unix timestamp.',
                 'default' => null,
-                'default' => '',
                 'example' => self::TYPE_DATETIME_EXAMPLE
             ])
             ->addRule('sdks', [