Can't update e-mail account.

UDP action for email endpoint throws Slim Application Error

Slim Application Error
The application could not run because of the following error:

Details
Type: ErrorException
Code: 8
Message: Undefined variable: action
File: /usr/local/cwpsrv/var/services/api/v1/index.php

Well its a typo

Action for update is "udp" in API documents. It has to be "upd"