delete unique key from db

app/controllers/api/users.php

@@ -209,6 +209,10 @@ $utopia->delete('/v1/users/:userId')
                 throw new Exception('Failed to remove user from DB', 500);
             }
 
+            if (!$projectDB->deleteUniqueKey(md5('users:email='.$user->getAttribute('email', null)))) {
+                throw new Exception('Failed to remove unique key from DB', 500);
+            }
+            
             $reservedId = $projectDB->createDocument([
                 '$collection' => Database::SYSTEM_COLLECTION_RESERVED,
                 '$id' => $userId,

src/Appwrite/Database/Adapter.php

@@ -88,6 +88,15 @@ abstract class Adapter
      */
     abstract public function deleteDocument($id);
 
+    /**
+     * Delete Unique Key.
+     *
+     * @param int $key
+     *
+     * @return array
+     */
+    abstract public function deleteUniqueKey($key);
+
     /**
      * Create Namespace.
      *

src/Appwrite/Database/Adapter/MySQL.php

@@ -191,7 +191,7 @@ class MySQL extends Adapter
             $st = $this->getPDO()->prepare('INSERT INTO `'.$this->getNamespace().'.database.unique`
                 SET `key` = :key;
             ');
-            
+
             $st->bindValue(':key', \md5($data['$collection'].':'.$key.'='.$value), PDO::PARAM_STR);
 
             if (!$st->execute()) {
@@ -366,6 +366,26 @@ class MySQL extends Adapter
         return [];
     }
 
+    /**
+     * Delete Unique Key.
+     *
+     * @param int $id
+     *
+     * @return array
+     *
+     * @throws Exception
+     */
+    public function deleteUniqueKey($key)
+    {
+        $st1 = $this->getPDO()->prepare('DELETE FROM `'.$this->getNamespace().'.database.unique` WHERE `key` = :key');
+
+        $st1->bindValue(':key', $key, PDO::PARAM_STR);
+
+        $st1->execute();
+
+        return [];
+    }
+
     /**
      * Create Relation.
      *

src/Appwrite/Database/Adapter/Redis.php

@@ -153,6 +153,22 @@ class Redis extends Adapter
         return $data;
     }
 
+    /**
+     * Delete Unique Key.
+     *
+     * @param $key
+     *
+     * @return array
+     *
+     * @throws Exception
+     */
+    public function deleteUniqueKey($key)
+    {
+        $data = $this->adapter->deleteUniqueKey($key);
+
+        return $data;
+    }
+
     /**
      * Create Namespace.
      *

src/Appwrite/Database/Database.php

@@ -298,6 +298,18 @@ class Database
         return new Document($this->adapter->deleteDocument($id));
     }
 
+    /**
+     * @param int $key
+     *
+     * @return Document|false
+     *
+     * @throws AuthorizationException
+     */
+    public function deleteUniqueKey($key)
+    {
+        return new Document($this->adapter->deleteUniqueKey($key));
+    }
+
     /**
      * @return array
      */