RWS Language Cloud API Authentication failed

Hi,

I am just getting started with the RWS Language Cloud API, to use with Trados Team.

Working through the documentation, I have set up a Service User, Integration Application; and have the API Client ID and Client Secret.

The Service User has been added to the Administrator and Project Manager groups.

Using Postman, I am able to authenticate the credentials to obtain the access_token.

However, if I attempt to GET Projects/Users/etc., I receive the following error:

{
    "errorCode""AUTHENTICATION_EXCEPTION",
    "message""Authentication failed",
    "details": []
}
As far as I can see, the only variables that I can set are
Our RWS Sales Rep that confirmed the API has been enabled.
Is there something obvious I am missing?
Thanks in advance
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