Update src/Appwrite/Auth/OAuth2/Auth0.php

Co-authored-by: Christy Jacob <christyjacob4@gmail.com>

src/Appwrite/Auth/OAuth2/Auth0.php

@@ -159,7 +159,7 @@ class Auth0 extends OAuth2
      *
      * @return array
      */
-    protected function getUser(string $accessToken)
+    protected function getUser(string $accessToken): array
     {
         if (empty($this->user)) {
             $headers = ['Authorization: Bearer '. \urlencode($accessToken)];