Not working on Microsoft Azure with subscription key

[JohnTailor]

Hi, thanks for contributing the library.

I called it like below (but with my subscription key)
translator = Translator('234234-234234-234234-324')

and got

mstranslator.AccessError: Access denied due to invalid subscription key. Make sure to provide a valid key for an active subscription.

However, the provided key matches the one on my Azure account and I signed up for "Translator Text API".
I have no idea if this is a an issue with Microsoft or the library. Any help is appreciated.