Error: x-access-key missing?

[RafAustralia]

hey All - hello

I have brought in the add on into my Ha but upon trying to connect I receive the following error

Error: unknown error 'Missing parameter in request header: x-access-key'

If anyone could point me to area in the code where I can enter in the key, that would be good... and appreciated. :)

Thank you and have a great day everyone