diff --git a/src/User.php b/src/User.php
index 2b380fc..4d8a47d 100644
--- a/src/User.php
+++ b/src/User.php
@@ -44,7 +44,7 @@ class User
     public function __construct($attributes = [])
     {
         foreach ($attributes as $key => $value) {
-            if (property_exists($this, 'key')) {
+            if (property_exists($this, $key)) {
                 $this->$key = $value;
             }
         }
@@ -155,4 +155,4 @@ public function getResponseData()
 
         return $data;
     }
-}
\ No newline at end of file
+}