App not recognising token

Hi,

Once i sign a user in , i cant seem to use the POST with the access_token under my artist API . Auth is denied with a 407

Sorry, you are not currently allowed to request:

    http://themeo-api.herokuapp.com/artists

from this cache until you have authenticated yourself.

I am passing the access_token. I have tried the same request in postman using a bearer token and just using it as a parameter

repo:
https://github.com/CasperGrey/themeo-api/

Docs:

https://github.com/CasperGrey/themeo-api/blob/master/DOCS.md