Error: Cannot read property 'consentToken' of undefined':

Hi,

I'm designing a skill that uses the DeviceAddressClient. I'm using

var contest = this.event.context.System.user.permissions.consentToken;

But for some reason I can't gather the consentToken, when ever I try I get a failure:

'TypeError: Cannot read property 'consentToken' of undefined'

Messing with my code a bit and using console.log I can see that my skill pulls up to

this.event.context.System.user

and gathers responses, but when I try to get this.event.context.System.user.permissions it throws as undefined.

Any ideas for what is causing this? I've been basing my skill of the offical GitHub example and cannot work this out.