Updated doc

Author: haphan

samples/identity/v3/tokens/export_authentication_token.php

@@ -30,4 +30,4 @@
 
 // Alternatively, one may persist token to memcache or redis
 // Redis and memcache then can purge the entry when token expires.
-$memcache->set('token', $token->export, $token->expires->format('U'));
+$memcache->set('token', $token->export(), $token->expires->format('U'));