"errorCode": "AUTHENTICATION_EXCEPTION"

I has got access token, and try check connection with cloud
RWS Language Cloud Public API Documentation (sdl.com)


I first try to collect all list of projects but below error has display.

{
    "errorCode""AUTHENTICATION_EXCEPTION",
    "message""Authentication failed",
    "details": []
}
I try it via postman and Trace ID is "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx".
Any body can help me please
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