Help With AccountRight API Setup in PHP

Hi,

I am having lots of trouble getting the API working and need help. This is  how far I've got -

I can get a code, then a token

I can refresh the token

What I cant do, is anything beyond that. I get messages as follows.

"Message": "API key is missing or inactive"

Header x-myobapi-key includes my api key that I used getting tokens sorted out so it should be ok.

I'll attach a screen shot of this in POSTMAN.

Any help would be very greatfully received. I've spent so much time getting this far.

Regrads,

Greg Ambrose